Q: Solve:
Solve -100*z = -74*z - 208 for z.

A: 8

Q: Solve:
Solve -814*c = 557*c - 1607*c + 15576 for c.

A: 66

Q: Solve:
Solve 0 = 3*a - 21 + 18 for a.

A:
1