Q: Solve 15*v + 10 = 5*v for v.

A: -1

Q: Solve -51*u + 35*u = 80 for u.

A: -5

Q: Solve -580 = 223*x - 203*x for x.

A: -29

Q: Solve -2*h = -75*h - 1158 + 136 for h.

A:
-14