Question: What is the solution?

Solve 178*o - 1618 + 16566 = -8452 + 2574 for o.

Answer: -117

Question: What is the solution?

Solve 0 = 499*r - 33 + 2029 for r.

Answer: -4

Question: What is the solution?

Solve -68*f + 169*f - 459 = 50*f for f.

Answer: 9

Question: What is the solution?

Solve -14*i - 27*i = 147*i + 2256 for i.

Answer:
-12