70-5.(x-3)=33.5
70-5.(x-3)=27.5
70-5.(x-3)=135
5.(x-3)=70-135
5.(x-3)=-65
x-3=-65:5
x-3=-13
x=-13+3
x=-10
b)2x-1=32016x-2016
....
70-5.(x-3)=33.5
70-5.(x-3)=27.5
70-5.(x-3)=135
5.(x-3)=70-135
5.(x-3)=-65
x-3=-65:5
x-3=-13
x=-13+3
x=-10
sorry nha câu b mình 0 bít