Q: Solve 37472 = -31*s + 38402 for s.

A: 30

Q: Solve -176*c = 115 + 61 for c.

A: -1

Q: Solve 140*d - 137*d = -21 for d.

A: -7

Q: Solve 145729*z = 145710*z - 76 for z.

A:
-4