Write down the solution for this math problem: Solve 3375 = -342*o - 102*o + 30015 for o.
answer: 60

Write down the solution for this math problem: Solve -17828*f + 927143 = -285161 for f.
answer: 68

Write down the solution for this math problem: Solve -3*i = 40 - 49 for i.
answer: 3

Write down the solution for this math problem: Solve -77*r - 245 + 14 = 0 for r.
answer:
-3