Q: What is the solution?
Solve -11647 + 12115 = 36*r for r.

A: 13

Q: What is the solution?
Solve -102*a = -293*a - 4202 for a.

A: -22

Q: What is the solution?
Solve 7*r + 8*r + 322 = -8*r for r.

A:
-14