Write down the solution for this math problem: Solve -387*r + 340 - 2773 = 16917 for r.
answer: -50

Write down the solution for this math problem: Solve 76*r - 438*r - 2172 = 0 for r.
answer: -6

Write down the solution for this math problem: Solve 0 = -6*b + 19 + 11 for b.
answer: 5

Write down the solution for this math problem: Solve 595 - 811 = -18*m + 2443 - 85 for m.
answer:
143