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中一代數式!!10000000000000000萬火急!!!!!!20分
1.2a+7=13 2.4b–5=–21 3.8=18–5c 4.59–3d=2 5.5=9+6–2x 6.4+3n–12=25 7.11–7y+3=–7 8.5h+1–4h=10 9.6m–11m+2=22 10.19–7b–5b=–53 注:要寫步驟!!!!!!!!!有d題數字前ge「–」係負數 但有d代表減 請留意!!!!!!!!!!!!!!!
最佳解答:
1.2a+7=13 2a=12-7 a=2.5 2.4b–5=–21 4b=-26 b=-6 2007-09-17 22:18:08 補充： 1.2a 7=132a 7-7=13-72a=62a÷2=6÷2a=32.4b–5=–214b-5 5=-21 54b=-16b=-4 2007-09-17 22:18:24 補充： 3.8=18–5c8 5c=18-5c 5c8 5c=188 5c-8=18-85c=105c÷5=10÷5c=24.59–3d=259-3d 3d=2 3d59=2 3d59-2=2 3d-257=3d3d=573d÷3=57÷3d=195.5=9 6–2x5 2x=9 6-2x 2x5 2x=9 65 2x-5=9 6-52x=102x÷2=10÷2x=5 2007-09-17 22:18:50 補充： 6.4 3n–12=254 3n-12 12=25 124 3n=374 3n-4=37-43n=333n÷3=33÷3n=117.11–7y 3=–711–7y 3-3=–7-311-7y=-1011-7y 7y=-10 7y11-(-10)=-10 7y-(-10)21=7y7y=217y÷7=21÷7y=3 2007-09-17 22:19:01 補充： 8.5h 1–4h=105h 1–4h-1=10-15h-4h=9h=99.6m–11m 2=22-5m 2=22-5m 2-(-5m)=22-(-5m)2=22 5m2-22=5m-20=5m5m=-205m÷5=-20÷5m=-410.19–7b–5b=–5319–7b–5b 5b=–53 5b19-7b=53 5b19-7b 7b=53 5b 7b19=-53 12b19-(-53)=-53 12b-(-53)72=12b12b=7212b÷12=72÷12b=6
其他解答:
1.2a+7=13 2a+7-7=13-7 2a=6 2a÷2=6÷2 a=3 2.4b–5=–21 4b-5+5=-21+5 4b=-16 b=-4 3.8=18–5c 8+5c=18-5c+5c 8+5c=18 8+5c-8=18-8 5c=10 5c÷5=10÷5 c=2 4.59–3d=2 59-3d+3d=2+3d 59=2+3d 59-2=2+3d-2 57=3d 3d=57 3d÷3=57÷3 d=19 5.5=9+6–2x 5+2x=9+6-2x+2x 5+2x=9+6 5+2x-5=9+6-5 2x=10 2x÷2=10÷2 x=5 6.4+3n–12=25 4+3n-12+12=25+12 4+3n=37 4+3n-4=37-4 3n=33 3n÷3=33÷3 n=11 7.11–7y+3=–7 11–7y+3-3=–7-3 11-7y=-10 11-7y+7y=-10+7y 11-(-10)=-10+7y-(-10) 21=7y 7y=21 7y÷7=21÷7 y=3 8.5h+1–4h=10 5h+1–4h-1=10-1 5h-4h=9 h=9 9.6m–11m+2=22 -5m+2=22 -5m+2-(-5m)=22-(-5m) 2=22+5m 2-22=5m -20=5m 5m=-20 5m÷5=-20÷5 m=-4 10.19–7b–5b=–53 19–7b–5b+5b=–53+5b 19-7b=53+5b 19-7b+7b=53+5b+7b 19=-53+12b 19-(-53)=-53+12b-(-53) 72=12b 12b=72 12b÷12=72÷12 b=6|||||1)2a+7=13 2a=13-7 a=6 2)4b–5=–21 4b=-21+5 b=-16/4 b=-4 3)8=18–5c10.19–7b–5b=–53 8-18=-5c -10/-5=c c=2 4)59–3d=2 -3d=2-59 -3d=-57 d=19 5)5=9+6–2x 9+6-2x=5 2x=5-9-6 x=-10/2 x=-5 6)4+3n–12=25 4+3n=25+12 4+3n=37 3n=37-4 n=33/3 n=11 7)11–7y+3=–7 -7y+3=-7-11 -7y+3=-18 -7y=-21 y=3 8)5h+1–4h=10 5h-4h+1=10 h=10-1 h=9 9)6m–11m+2=22 -5m=20 m=-4 10)19–7b–5b=–53 -7b-5b=-53-19 -12b=-72 b=-72/-12 b=6 2007-09-16 21:04:12 補充： 唔好睇錯d負號bor...希望幫到你啦=]|||||1) 2a+7=13 2a=13-7 2a=6 a=3 2) 4b-5= -21 4b= -21+5 4b= -16 b= -4 3) 8=18-5c 5c=18-8 5c=10 c=2 4) 59-3d=2 59-2 =3d 57=3d d=19 5) 5=9+6-2x 2x=9+6-5 2x=10 x=5 6) 4+3n–12=25 3n=25-4+12 3n=33 n=11 7) 11–7y+3=–7 11+7+3=7y 21=7y y=3 8) 5h+1–4h=10 5h-4h=10-1 h=9 9) 6m–11m+2=22 6m-11m=22-2 -5m=20 m= -4 10) 19–7b–5b=–53 19+53=7b+5b 72=12b b=7|||||1.2a+7=13 2a=13-7 a=6/2 a=3 2.4b–5=–21 4b=-21+5 b=-16/4 b=-4 3.8=18–5c -5c=8-18 -5c=-10 c=-10/-5 c=2 4.59–3d=2 -3d=2-59 -3d=-57 d=-57/-3 d=19 5.5=9+6–2x -2x=5-9-6 -2x=-10 x=-10/-2 x=5 6.4+3n–12=25 3n=25-4+12 3n=33 n=11 7.11–7y+3=–7 -7y=-7-11-3 -7y=-21 y=-21/-7 y=3 8.5h+1–4h=10 5h-4h=10-1 h=9 9.6m–11m+2=22 6m–11m=22-2 -5m=20 m=20/-5 m=-4 10.19–7b–5b=–53 –7b–5b=–53-19 -12b=-72 b=-72/-12 b=6 你自己應該多d計下數,it is so easy to do|||||1.)2a+7=13 2a=6 a=3 2.)4b-5=-21 4b=26 b=6.5 3.)8=18-5c -10=-5c c=2 4.)59-3d=2 -3d=-57 d=19 5.)5=9+6-2x 5=15-2x -10=2x x=-5 6.)4+3n-12=25 3n-8=25 3n=33 n=11 7.)11-7y+3=-7 -7y+14=-7 -7y=-21 y=3 8.)5h+1-4h=10 5h-4h=9 h=9 9.)6m-11m+2=22 -5m+2=22 -5m=20 m=-4 10.)19-7b-5b=-23 -12b=-4 b=1/3|||||1.2a+7=13 2a=13-7 2a=6 a=6/2 a=3 2.4b-5=-21 4b=-21+5 4b=-16 b=-4 3.8=18-5c 8-18=-5c -10=-5c c=2 4.59-3d=2 -3d=2-59 -3d=-57 d=19 5.5=9+6-2X 5=15-2X 5-15=-2X -10=-2X X=5 6.4+3N-12=25 3N-8=25 3N=33 N=11 7.11-7Y+3=-7 -7Y+14=-7 -7Y=-21 Y=3 8.5H+1-4H=10 1+H=10 H=9 9.6M-11M+2=22 -5m=20 m=-5 10.19-7B-5B=-53 19-12B=-53 -12B=-72 B=6|||||1.2a+7=13 2a=13-7 2a=6 a=3 2.4b-5=-21 4b=-21+5 4b=-16 4b=-4 3.8=18-5c 18-8=5c 5c=10 4.59-3d=2 -3d=2-59 -3d=-57 d=19 5.5=9+6-2x 2x=9+6-5 2x=10 x=5 6.4+3n-12=25 3n=25-4+12 3n=33 n=11 7.11-7y+3=-7 -7y=-7-11-3 -7y=-21 y=3 8.5h+1-4h=10 5h-4h=10-1 h=9 9.6m-11m+2=22 6m-11m=22-2 -5m=20 m=-4 10.19-7b-5b=-53 -7b-5b=-53-19 -12b=72 b=6 注:有d「-」即係負號，你可能睇唔到，你要認真睇清楚d負號|||||1)2a+7=13 2a=6 a=3 2)4b-5=-21 4b=-16 b=-4 3)8=18-5c -10=-5c c=2 4)59-3d=2 -3d=-57 d =19 5)5=9+6-2x 5=15-2x -10=-2x x=5 6)4+3n-12=25 3n=33 n=11 7)11-7y+3=-7 -7y=-7 y=1 8)5h+1-4h=10 5h-4h=9 h=9 9)6m-11m+2=22 -5m+2=22 -5m=20 m=-4 10)19-7b-5b=-53 -7b-5b=-72 -12b=-72 b=6|||||1. 2A = 13 - 7 2a = 6 a = 3 2. 4B = -21 + 5 4b = -16 b = -4 3. 8 - 18 = -5c -10 = -5c 2 = c 4. -3d = 2- 59 -3d = -57 d = 19 5. 5 - 9 - 6 = -2x -10 = -2x 5 = x 6. 3n = 25 - 4 +12 3n = 33 n = 11 7. -7y = -7 - 11 - 3 -7y = -21 y = 3 8. 5h - 4h = 10 - 1 h = 9 9. 6m - 11m = 22 - 2 -5m = 20 m = -4 10. -7b - 5b = -53 - 19 -12b = -72 b = 6 絕對冇錯快比分|||||1) 2a=13-7 2a=6 a=3 2) 4b= -21+5 4b= -16 b= -4 3) 5c=18-8 5c=10 c=2 4) 59-2=3d 57=3d d=19 5) 5=15 -2x 2x=15-5 2x=10 x=5 6) 3n-8=25 3n=33 n=11 7) 14-7y= -7 21=7y y=3 8) h=10-1 h=9 9) 2-5m=22 -5m=20 m= -4 10) 19-12b= -53 12b=72 b=6960E6207E048F01D
中一代數式!!10000000000000000萬火急!!!!!!20分
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發問:1.2a+7=13 2.4b–5=–21 3.8=18–5c 4.59–3d=2 5.5=9+6–2x 6.4+3n–12=25 7.11–7y+3=–7 8.5h+1–4h=10 9.6m–11m+2=22 10.19–7b–5b=–53 注:要寫步驟!!!!!!!!!有d題數字前ge「–」係負數 但有d代表減 請留意!!!!!!!!!!!!!!!
最佳解答:
1.2a+7=13 2a=12-7 a=2.5 2.4b–5=–21 4b=-26 b=-6 2007-09-17 22:18:08 補充： 1.2a 7=132a 7-7=13-72a=62a÷2=6÷2a=32.4b–5=–214b-5 5=-21 54b=-16b=-4 2007-09-17 22:18:24 補充： 3.8=18–5c8 5c=18-5c 5c8 5c=188 5c-8=18-85c=105c÷5=10÷5c=24.59–3d=259-3d 3d=2 3d59=2 3d59-2=2 3d-257=3d3d=573d÷3=57÷3d=195.5=9 6–2x5 2x=9 6-2x 2x5 2x=9 65 2x-5=9 6-52x=102x÷2=10÷2x=5 2007-09-17 22:18:50 補充： 6.4 3n–12=254 3n-12 12=25 124 3n=374 3n-4=37-43n=333n÷3=33÷3n=117.11–7y 3=–711–7y 3-3=–7-311-7y=-1011-7y 7y=-10 7y11-(-10)=-10 7y-(-10)21=7y7y=217y÷7=21÷7y=3 2007-09-17 22:19:01 補充： 8.5h 1–4h=105h 1–4h-1=10-15h-4h=9h=99.6m–11m 2=22-5m 2=22-5m 2-(-5m)=22-(-5m)2=22 5m2-22=5m-20=5m5m=-205m÷5=-20÷5m=-410.19–7b–5b=–5319–7b–5b 5b=–53 5b19-7b=53 5b19-7b 7b=53 5b 7b19=-53 12b19-(-53)=-53 12b-(-53)72=12b12b=7212b÷12=72÷12b=6
其他解答:
1.2a+7=13 2a+7-7=13-7 2a=6 2a÷2=6÷2 a=3 2.4b–5=–21 4b-5+5=-21+5 4b=-16 b=-4 3.8=18–5c 8+5c=18-5c+5c 8+5c=18 8+5c-8=18-8 5c=10 5c÷5=10÷5 c=2 4.59–3d=2 59-3d+3d=2+3d 59=2+3d 59-2=2+3d-2 57=3d 3d=57 3d÷3=57÷3 d=19 5.5=9+6–2x 5+2x=9+6-2x+2x 5+2x=9+6 5+2x-5=9+6-5 2x=10 2x÷2=10÷2 x=5 6.4+3n–12=25 4+3n-12+12=25+12 4+3n=37 4+3n-4=37-4 3n=33 3n÷3=33÷3 n=11 7.11–7y+3=–7 11–7y+3-3=–7-3 11-7y=-10 11-7y+7y=-10+7y 11-(-10)=-10+7y-(-10) 21=7y 7y=21 7y÷7=21÷7 y=3 8.5h+1–4h=10 5h+1–4h-1=10-1 5h-4h=9 h=9 9.6m–11m+2=22 -5m+2=22 -5m+2-(-5m)=22-(-5m) 2=22+5m 2-22=5m -20=5m 5m=-20 5m÷5=-20÷5 m=-4 10.19–7b–5b=–53 19–7b–5b+5b=–53+5b 19-7b=53+5b 19-7b+7b=53+5b+7b 19=-53+12b 19-(-53)=-53+12b-(-53) 72=12b 12b=72 12b÷12=72÷12 b=6|||||1)2a+7=13 2a=13-7 a=6 2)4b–5=–21 4b=-21+5 b=-16/4 b=-4 3)8=18–5c10.19–7b–5b=–53 8-18=-5c -10/-5=c c=2 4)59–3d=2 -3d=2-59 -3d=-57 d=19 5)5=9+6–2x 9+6-2x=5 2x=5-9-6 x=-10/2 x=-5 6)4+3n–12=25 4+3n=25+12 4+3n=37 3n=37-4 n=33/3 n=11 7)11–7y+3=–7 -7y+3=-7-11 -7y+3=-18 -7y=-21 y=3 8)5h+1–4h=10 5h-4h+1=10 h=10-1 h=9 9)6m–11m+2=22 -5m=20 m=-4 10)19–7b–5b=–53 -7b-5b=-53-19 -12b=-72 b=-72/-12 b=6 2007-09-16 21:04:12 補充： 唔好睇錯d負號bor...希望幫到你啦=]|||||1) 2a+7=13 2a=13-7 2a=6 a=3 2) 4b-5= -21 4b= -21+5 4b= -16 b= -4 3) 8=18-5c 5c=18-8 5c=10 c=2 4) 59-3d=2 59-2 =3d 57=3d d=19 5) 5=9+6-2x 2x=9+6-5 2x=10 x=5 6) 4+3n–12=25 3n=25-4+12 3n=33 n=11 7) 11–7y+3=–7 11+7+3=7y 21=7y y=3 8) 5h+1–4h=10 5h-4h=10-1 h=9 9) 6m–11m+2=22 6m-11m=22-2 -5m=20 m= -4 10) 19–7b–5b=–53 19+53=7b+5b 72=12b b=7|||||1.2a+7=13 2a=13-7 a=6/2 a=3 2.4b–5=–21 4b=-21+5 b=-16/4 b=-4 3.8=18–5c -5c=8-18 -5c=-10 c=-10/-5 c=2 4.59–3d=2 -3d=2-59 -3d=-57 d=-57/-3 d=19 5.5=9+6–2x -2x=5-9-6 -2x=-10 x=-10/-2 x=5 6.4+3n–12=25 3n=25-4+12 3n=33 n=11 7.11–7y+3=–7 -7y=-7-11-3 -7y=-21 y=-21/-7 y=3 8.5h+1–4h=10 5h-4h=10-1 h=9 9.6m–11m+2=22 6m–11m=22-2 -5m=20 m=20/-5 m=-4 10.19–7b–5b=–53 –7b–5b=–53-19 -12b=-72 b=-72/-12 b=6 你自己應該多d計下數,it is so easy to do|||||1.)2a+7=13 2a=6 a=3 2.)4b-5=-21 4b=26 b=6.5 3.)8=18-5c -10=-5c c=2 4.)59-3d=2 -3d=-57 d=19 5.)5=9+6-2x 5=15-2x -10=2x x=-5 6.)4+3n-12=25 3n-8=25 3n=33 n=11 7.)11-7y+3=-7 -7y+14=-7 -7y=-21 y=3 8.)5h+1-4h=10 5h-4h=9 h=9 9.)6m-11m+2=22 -5m+2=22 -5m=20 m=-4 10.)19-7b-5b=-23 -12b=-4 b=1/3|||||1.2a+7=13 2a=13-7 2a=6 a=6/2 a=3 2.4b-5=-21 4b=-21+5 4b=-16 b=-4 3.8=18-5c 8-18=-5c -10=-5c c=2 4.59-3d=2 -3d=2-59 -3d=-57 d=19 5.5=9+6-2X 5=15-2X 5-15=-2X -10=-2X X=5 6.4+3N-12=25 3N-8=25 3N=33 N=11 7.11-7Y+3=-7 -7Y+14=-7 -7Y=-21 Y=3 8.5H+1-4H=10 1+H=10 H=9 9.6M-11M+2=22 -5m=20 m=-5 10.19-7B-5B=-53 19-12B=-53 -12B=-72 B=6|||||1.2a+7=13 2a=13-7 2a=6 a=3 2.4b-5=-21 4b=-21+5 4b=-16 4b=-4 3.8=18-5c 18-8=5c 5c=10 4.59-3d=2 -3d=2-59 -3d=-57 d=19 5.5=9+6-2x 2x=9+6-5 2x=10 x=5 6.4+3n-12=25 3n=25-4+12 3n=33 n=11 7.11-7y+3=-7 -7y=-7-11-3 -7y=-21 y=3 8.5h+1-4h=10 5h-4h=10-1 h=9 9.6m-11m+2=22 6m-11m=22-2 -5m=20 m=-4 10.19-7b-5b=-53 -7b-5b=-53-19 -12b=72 b=6 注:有d「-」即係負號，你可能睇唔到，你要認真睇清楚d負號|||||1)2a+7=13 2a=6 a=3 2)4b-5=-21 4b=-16 b=-4 3)8=18-5c -10=-5c c=2 4)59-3d=2 -3d=-57 d =19 5)5=9+6-2x 5=15-2x -10=-2x x=5 6)4+3n-12=25 3n=33 n=11 7)11-7y+3=-7 -7y=-7 y=1 8)5h+1-4h=10 5h-4h=9 h=9 9)6m-11m+2=22 -5m+2=22 -5m=20 m=-4 10)19-7b-5b=-53 -7b-5b=-72 -12b=-72 b=6|||||1. 2A = 13 - 7 2a = 6 a = 3 2. 4B = -21 + 5 4b = -16 b = -4 3. 8 - 18 = -5c -10 = -5c 2 = c 4. -3d = 2- 59 -3d = -57 d = 19 5. 5 - 9 - 6 = -2x -10 = -2x 5 = x 6. 3n = 25 - 4 +12 3n = 33 n = 11 7. -7y = -7 - 11 - 3 -7y = -21 y = 3 8. 5h - 4h = 10 - 1 h = 9 9. 6m - 11m = 22 - 2 -5m = 20 m = -4 10. -7b - 5b = -53 - 19 -12b = -72 b = 6 絕對冇錯快比分|||||1) 2a=13-7 2a=6 a=3 2) 4b= -21+5 4b= -16 b= -4 3) 5c=18-8 5c=10 c=2 4) 59-2=3d 57=3d d=19 5) 5=15 -2x 2x=15-5 2x=10 x=5 6) 3n-8=25 3n=33 n=11 7) 14-7y= -7 21=7y y=3 8) h=10-1 h=9 9) 2-5m=22 -5m=20 m= -4 10) 19-12b= -53 12b=72 b=6960E6207E048F01D
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