Q: What is the solution?
Solve 2869*l - 644 = 2897*l for l.

A: -23

Q: What is the solution?
Solve 7*m = 19*m - 30 - 54 for m.

A: 7

Q: What is the solution?
Solve 57*r = 84 + 258 for r.

A:
6