Write down the solution for this math problem: Solve -599 + 280 = 29*b for b.
answer: -11

Write down the solution for this math problem: Solve -871*y - 67725 = 112*y + 4034 for y.
answer: -73

Write down the solution for this math problem: Solve 20 = -270*k + 260*k for k.
answer: -2

Write down the solution for this math problem: Solve 43229*s = 43176*s - 2385 for s.
answer:
-45