1/5x-1/2(2-2x)=3

问题描述:

1/5x-1/2(2-2x)=3

1/5x-1/2(2-2x)=3
1/5x-1+x=3
1/5x+x=3+1
6/5x=4
x=4÷6/5
x=3又3分之1