Question: What is the solution?

Solve -37*v + 126*v = 712 for v.

Answer: 8

Question: What is the solution?

Solve f + 2 = -4 for f.

Answer: -6

Question: What is the solution?

Solve 36*z - 20 = 15*z + 16*z for z.

Answer: 4

Question: What is the solution?

Solve -6*n - 123 = -111 for n.

Answer:
-2