Write down the solution for this math problem: Solve 117 = 24*h - 99 for h.
answer: 9

Write down the solution for this math problem: Solve -99*m + 95*m = 16 for m.
answer: -4

Write down the solution for this math problem: Solve -87673*o = -88156*o + 18354 for o.
answer: 38

Write down the solution for this math problem: Solve 23 - 31 = -r for r.
answer:
8