Q: What is the solution?
Solve 33*u = -47*u for u.

A: 0

Q: What is the solution?
Solve -17*o - 48*o + 123*o + 580 = 0 for o.

A: -10

Q: What is the solution?
Solve -6*a + 21 = 39 for a.

A:
-3