Solve 1231*x - 629*x = 640*x + 152 for x.
Solve this plz.

A: -4

Solve 0 = -0*p + 3*p - 12 for p.
Solve this plz.

A: 4

Solve 7*q = -529 + 438 for q.
Solve this plz.

A:
-13