Q: Solve:
Solve 0 = 290*r - 71*r - 219 for r.

A: 1

Q: Solve:
Solve 18687*g - 18675*g + 120 = 0 for g.

A: -10

Q: Solve:
Solve 0*c - 15*c = 0 for c.

A:
0