Q: Solve:
Solve -59*f + 39*f = -80 for f.

A: 4

Q: Solve:
Solve 27*k = -41*k + 68 for k.

A: 1

Q: Solve:
Solve -287*k = -579*k + 702*k + 1140*k - 7750 for k.

A:
5