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發問:

我有一條數學題唔識做! 有請各位數學高手幫幫我! １．The difference between two number is 15.The sum of the larger number and 5/8（分數：五分之八）ofthe smaller number is 54.Find the larger number. 幫幫我解吓呢條題目！ 同教教我點做！ ｐｌｅａｓｅ！！！！！！！！！ 更新: 2. A 2-digit number is divisible by both 2 and 5.Half this number is less than 6 time the tens digit of the number by 4.Find this of the 2-digit number. 可唔可以解埋條題目比我！我唔識解呀！教埋我點做！ 更新 2: 3.The are some chickens and rabbits in a cage.1/3(分數:三分一)of the rabbits were born to have 3 legs.If the total number of heads is35 and the total number of legs is90,find the number of (a)chickens (b)rabbits with 4 legs 可唔可以解埋條題目比我！我唔識解呀！教埋我點做！

最佳解答:

題目問: 兩個數相減是15. 較大果個數加埋較細果個數既5/8等於54. 求較大果個數. 首先假設較大果個數是a, 較細果個數是b a-b=15 b=a-15...(1) a+b(5/8)=54 ...(2) 代入(1) 式 a+(a-15)(5/8)=54 8a+5(a-15)=54*8 8a+5a-75=432 13a=507 a=39 2007-12-28 21:20:55 補充： 你是說五分之八(8/5) 還是八分之五(5/8)呢?

其他解答:

If the the larger number x then the smaller number is x-15 x+(x-15)8/5=54 x=30 ∴the larger number is 30.8758B59A7FA1EEA7