Q: Solve -4*o - o = 0 for o.

A: 0

Q: Solve 2989 = 219*i + 580 for i.

A: 11

Q: Solve -14*v + 62 = 132 for v.

A: -5

Q: Solve 0 = -123*z + 115*z - 40 for z.

A:
-5