Q: Solve:
Solve 495 = -5*k + 505 for k.

A: 2

Q: Solve:
Solve 225*u - 621*u + 215*u = -221*u + 880 for u.

A: 22

Q: Solve:
Solve 17*y + 36*y + 795 = 0 for y.

A:
-15