Q: Solve:
Solve -25*k + 6 = -28*k for k.

A: -2

Q: Solve:
Solve -3800*o - 1439*o = 7849 - 32421 - 12101 for o.

A: 7

Q: Solve:
Solve 7*w - 216 = -20*w + 45*w for w.

A:
-12