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

Question

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

Comments

1) 3х-3+х-2х=0 3х+х-2х=3 2х=3 х=3:2 х=1,5

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5(x+4)+x=6 3(x-7)-6x=-x а эти?

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