Q: What is the solution?
Solve 5*i = -45 + 15 for i.

A: -6

Q: What is the solution?
Solve -5430*r - 60381 = -7416*r + 54807 for r.

A: 58

Q: What is the solution?
Solve 724*u - 88596 = 3185*u for u.

A:
-36