Answer:

7.

[tex]7x + 1 = 2(3x + 3)[/tex]

8.

[tex]8x - 1 = 7x + 10[/tex]

9.

[tex]2x + 170 + 52 = 360[/tex]

10.

[tex] \frac{(4x - 12) + (2x + 3)}{2} = 15[/tex]