Q: What is the solution?
Solve -242*u + 580 = -213*u for u.

A: 20

Q: What is the solution?
Solve 19360 = 2208*r + 11083*r + 6069*r for r.

A: 1

Q: What is the solution?
Solve 0 = -44*p - 309*p + 6684 - 2448 for p.

A:
12