Q: Solve 25*c = 6*c - 57*c - 608 for c.

A: -8

Q: Solve -8*r - 24 = -2*r for r.

A: -4

Q: Solve 124*z - 310*z - 4650 = 0 for z.

A: -25

Q: Solve 0 = -7*q + 14*q + 21 for q.

A:
-3