Q: Solve:
Solve 0*t + 20 = 5*t for t.

A: 4

Q: Solve:
Solve 0 = -182*r + 3831 - 4013 for r.

A: -1

Q: Solve:
Solve 0 = 1239*t + 815*t + 18167 + 6481 for t.

A:
-12