Write down the solution for this math problem: Solve 0 = -19*o + 17*o - 10 for o.
answer: -5

Write down the solution for this math problem: Solve -i = 36 - 20 - 21 for i.
answer: 5

Write down the solution for this math problem: Solve 156 = 11*h + 7 - 49 for h.
answer: 18

Write down the solution for this math problem: Solve -39 = 11074*r - 11071*r for r.
answer:
-13