Q: What is the solution?
Solve -292 + 390 = 14*d for d.

A: 7

Q: What is the solution?
Solve 8*o + 5*o + 41*o = -270 for o.

A: -5

Q: What is the solution?
Solve -185*r + 4 = -187*r for r.

A:
-2