(X-1)/0.2 -X/0.8 =10

问题描述:

(X-1)/0.2 -X/0.8 =10

答案x=4

4*(x-1)-x = 8
3x = 12
x =4

(X-1)/0.2 -X/0.8 =10
5(X-1) -5X/4 =10
(X-1) -X/4 =2
4(X-1) -X =8
4x-4-x=8
3x=12
x=4

4