Q: Solve:
Solve 638*r = -1905 - 23615 for r.

A: -40

Q: Solve:
Solve 35*u - 74*u = -43*u for u.

A: 0

Q: Solve:
Solve -2001*t - 4246*t + 358*t + 87335 = -218893 for t.

A:
52