Q: Solve:
Solve -428*k - 22860 - 35016 = 303*k - 95*k for k.

A: -91

Q: Solve:
Solve 66*f - 63*f = -15 for f.

A: -5

Q: Solve:
Solve -2562*s + 2639*s + 270 + 269 = 0 for s.

A:
-7