Question: What is the solution?

Solve 3*p + 137 = 122 for p.

Answer: -5

Question: What is the solution?

Solve -12*x + 108 = 14*x - 17*x for x.

Answer: 12

Question: What is the solution?

Solve -16 - 8 = -6*f for f.

Answer: 4

Question: What is the solution?

Solve 55 - 439 = -7*f + 55*f for f.

Answer:
-8