Q: Solve -91 + 261 = 17*z for z.

A: 10

Q: Solve 16*x - 478 = -670 for x.

A: -12

Q: Solve 62*f - 7282 = -8522 for f.

A: -20

Q: Solve -2074*c = -2072*c + 4 for c.

A:
-2