Write down the solution for this math problem: Solve 557 - 539 = 9*a for a.
answer: 2

Write down the solution for this math problem: Solve -4960 = -41*s - 3976 for s.
answer: 24

Write down the solution for this math problem: Solve 0 = 284*c - 240*c + 296*c - 2040 for c.
answer: 6

Write down the solution for this math problem: Solve 212*h - 40 = 202*h for h.
answer:
4