Q: What is the solution?
Solve 26*m - 18*m - 21*m - 338 = 0 for m.

A: -26

Q: What is the solution?
Solve 0 = -118*a + 123*a + 10 for a.

A: -2

Q: What is the solution?
Solve 0*c + 5*c = -15 for c.

A:
-3