Q: Solve 634 = 47*w + 117 for w.

A: 11

Q: Solve 0 = 33*p - 17*p + 64 for p.

A: -4

Q: Solve -21*y - 81 = -19 - 209 for y.

A: 7

Q: Solve -14*r + 19*r = -25 for r.

A:
-5