Q: Solve:
Solve -86*x + 64*x = 231*x + 6325 for x.

A: -25

Q: Solve:
Solve -16*f + 18976 = 19*f + 18976 for f.

A: 0

Q: Solve:
Solve 11 - 50 = 13*i for i.

A:
-3