Question: What is the solution?

Solve -48*c + 42*c + 9*c + 36 = 0 for c.

Answer: -12

Question: What is the solution?

Solve 19*z = 13*z - 12 for z.

Answer: -2

Question: What is the solution?

Solve -15*s - 113 = -53 for s.

Answer: -4

Question: What is the solution?

Solve -32 = -q - 7*q for q.

Answer:
4