Question: What is the solution?

Solve 6*q - 13 - 11 = 0 for q.

Answer: 4

Question: What is the solution?

Solve -z + 4*z + 30 = -12*z for z.

Answer: -2

Question: What is the solution?

Solve -120*a = -125*a - 10 for a.

Answer: -2

Question: What is the solution?

Solve -3043 + 9355 = -789*h for h.

Answer:
-8