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

1.)
x + (3x+7) = x-2
4x + 7 = x - 2
4x - x = -2 - 7
3x = -9
[tex]x = \frac{ - 9}{3} [/tex]
[tex]x = -3[/tex]

2.)
x+2(4+2x) = 5
x + 8 + 4x = 5
4x + x = 5 - 8
5x = -3
[tex]x = \frac{ - 3}{5} [/tex]

3.)
3(x-1)+x = -x+7
3x - 3 + x = -x + 7
3x + x + x = 7 + 3
5x = 10
[tex]x = \frac{10}{5} [/tex]
[tex]x = 2[/tex]