Q: Solve:
Solve -96 - 138 = -81*u + 3*u for u.

A: 3

Q: Solve:
Solve -2984 = 1300*v + 678 + 2838 for v.

A: -5

Q: Solve:
Solve 1105*k = 47559 - 65925 - 53459 for k.

A:
-65