Q: What is the solution?
Solve -2*y - 14 + 18 = 0 for y.

A: 2

Q: What is the solution?
Solve -4*r = 4*r - 203 + 139 for r.

A: 8

Q: What is the solution?
Solve -936 = 34703*u - 34651*u for u.

A:
-18