Write down the solution for this math problem: Solve 10158*r = 10274*r - 580 for r.
answer: 5

Write down the solution for this math problem: Solve 338 = 36*h + 31 - 233 for h.
answer: 15

Write down the solution for this math problem: Solve -281 = -5*o - 236 for o.
answer: 9

Write down the solution for this math problem: Solve 0 = 334*n - 51*n + 1869 + 1244 for n.
answer:
-11