Q: What is the solution?
Solve 84*q - 207 = -375 for q.

A: -2

Q: What is the solution?
Solve 0 = -502472*d + 500211*d + 246449 for d.

A: 109

Q: What is the solution?
Solve 110*s + 7*s = -190*s - 307 for s.

A:
-1