Q: Solve:
Solve -160*i + 20691 = -479*i - 501*i - 269*i for i.

A: -19

Q: Solve:
Solve 0 = 9*c - 839 + 776 for c.

A: 7

Q: Solve:
Solve -398*f - 3479 = -11157 - 15008 for f.

A:
57