Question

помогите 3(x-1)+x=2x    5(x+4)+x=6     3(x-7)-6x=-x

Answer 1

3(x-1)+x=2x   
3x-3+x=2x
2x=3
x=1.5

5(x+4)+x=6    
5x+20+x=6
6x=-14
x=-7/3

3(x-7)-6x=-x
3x-21-6x=-x
2x=-21
x=-10.5