A certain number of apples are distributed among poor children.If 3 apples are given to each of them,80 apples remain and if 4 apples are distributed to each of them,there is a shortage of 30 apples.Find the numbers of children and apples.(方程式加答案!)
A certain number of apples are distributed among poor children.If 3 apples are given to each of them,80 apples remain and if 4 apples are distributed to each of them,there is a shortage of 30 apples.Find the numbers of children and apples.(方程式加答案!)
题目意思：
给小孩分苹果。每人分3个的话，还有80个苹果剩余。如果每人分4个的话，还少30个。问小孩和苹果各多少个。
设小孩人数为x，苹果数为y；
3x+80=y
4x-30=y
=>4x-30=3x+80
=>x=110
=>y=410
所以小孩个数是110个，苹果410个
Assume that there are totally x apples and n poor children.
As we all konw from this issue, we can write the following equation:
3n+80=x=4n-30
n=110
x=410
so there're 410 apples and 110 children.
题目意思是给每人3个苹果还多80个,给每人4个又少了30个
设有x人y个苹果
y=3x+80
y=4x-30
得x=110 y=410
即有110人410个苹果
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