Q: What is the solution?
Solve 3962*d + 2594 + 10655 = 357943 for d.

A: 87

Q: What is the solution?
Solve -579*r - 2090 = 2542 for r.

A: -8

Q: What is the solution?
Solve 15*f + 294 - 399 = 0 for f.

A:
7