Write down the solution for this math problem: Solve -28*b = -33*b for b.
answer: 0

Write down the solution for this math problem: Solve 15*m + 9 = 12*m for m.
answer: -3

Write down the solution for this math problem: Solve -1387*p - 417397 = -450685 for p.
answer: 24

Write down the solution for this math problem: Solve -3*u + 3931 = 3841 for u.
answer:
30