Q: Solve -13*x + 108*x + 3115 - 8587 = -57*x for x.

A: 36

Q: Solve 0 = 10*v - 0*v + 30 for v.

A: -3

Q: Solve -21*b = 134 - 92 for b.

A: -2

Q: Solve 122 + 218 = -132*r - 452 for r.

A:
-6