Write down the solution for this math problem: Solve 16*r - 15*r = -1 for r.
answer: -1

Write down the solution for this math problem: Solve -186 - 137 = -62*s + 297 for s.
answer: 10

Write down the solution for this math problem: Solve -41 = -27*o + 40 for o.
answer: 3

Write down the solution for this math problem: Solve -122*b = -466*b - 187*b + 2124 for b.
answer:
4