Q: Solve 0 = 10*c + 180 - 240 for c.

A: 6

Q: Solve -533 + 365 = 28*h for h.

A: -6

Q: Solve 0 = -3356*c - 3181*c + 2328*c + 29463 for c.

A: 7

Q: Solve -31*x = 93 - 248 for x.

A:
5