Write down the solution for this math problem: Solve 0*o = -10*o - 10 for o.
answer: -1

Write down the solution for this math problem: Solve 0 = -15*r + 69 - 384 for r.
answer: -21

Write down the solution for this math problem: Solve 172*m - 360*m + 181*m + 245 = 0 for m.
answer: 35

Write down the solution for this math problem: Solve 158*i - 855 + 804 = 1845 for i.
answer:
12