Q: Solve -2*x + 251 = -15*x + 4 for x.

A: -19

Q: Solve 22*c + 10 = -144 for c.

A: -7

Q: Solve 10*u - 46*u = -15*u - 819 for u.

A: 39

Q: Solve 0 = 7*r + 6*r - 10*r for r.

A:
0