Q: What is the solution?
Solve 0 = 221*o - 111 + 995 for o.

A: -4

Q: What is the solution?
Solve 243*b + 7770 - 1125 = -4047 for b.

A: -44

Q: What is the solution?
Solve -104*o + 647 - 413 = -702 for o.

A:
9