Q: What is the solution?
Solve -65*o - 155*o - 4043 = 91*o for o.

A: -13

Q: What is the solution?
Solve 0 = -19*f - 5*f - 96 for f.

A: -4

Q: What is the solution?
Solve -5*r - 5 + 15 = 0 for r.

A:
2