Q: What is the solution?
Solve 99*b - 246*b - 261 = -118*b for b.

A: -9

Q: What is the solution?
Solve 0 = -33*r + 24*r + 36 for r.

A: 4

Q: What is the solution?
Solve -29*k + 64*k + 315 = 0 for k.

A:
-9