Q: Solve:
Solve -2461*c + 2420*c - 2460 = 0 for c.

A: -60

Q: Solve:
Solve 88*x = 85*x - 9 for x.

A: -3

Q: Solve:
Solve 39919 + 2041 = 866*d - 13464 for d.

A:
64