Q: Solve:
Solve 0 = -5*h + 19*h + 126 for h.

A: -9

Q: Solve:
Solve -720*w + 724*w = 0 for w.

A: 0

Q: Solve:
Solve -80*y = -163*y + 370*y + 294*y + 49966 for y.

A:
-86