Q: What is the solution?
Solve 18*r = 20*r + 6 for r.

A: -3

Q: What is the solution?
Solve 0 = 18*v + 1092 - 1110 for v.

A: 1

Q: What is the solution?
Solve 39*x + 205 = 10 for x.

A:
-5