方程式

问题描述:

方程式
after subtracting 8 from a number,the difference multiplied by 9 is 108.find the number.

Surpouse original number is:x;
Subtracting 8:x-8;
Tthe difference multiplied by 9 is 108:(x-8)*9=108;
therefore:x=(108/9)+8=20;
The number is:20;