Q: Solve:
Solve -u - 3*u - 20 = 0 for u.

A: -5

Q: Solve:
Solve -49*g + 52*g + 15 = 0 for g.

A: -5

Q: Solve:
Solve -100 + 71 + 99 = -5*z for z.

A:
-14