Question: What is the solution?

Solve 30*p = 31*p - 3 for p.

Answer: 3

Question: What is the solution?

Solve -388*w - 79*w + 98*w = 280*w + 1947 for w.

Answer: -3

Question: What is the solution?

Solve -65*b + 1496 = -201*b for b.

Answer: -11

Question: What is the solution?

Solve 0 = 3*b + 18*b + 84 for b.

Answer:
-4