Please show work I have more pictures otw

Answer:
-3/5, 4, 5, 35
Step-by-step explanation:
7 - 3x = 12
-3x = 5
x = -3/5
7(x - 3) = 7
7x - 21 = 7
7x = 28
x = 4
7x - 16 + 8x = 59
15x - 16 = 59
15x = 75
x = 5
3x - 5 + 2x + 10 = 180
5x + 5 = 180
5x = 175
x = 35