Q: What is the solution?
Solve 1672 - 2383 = -79*q for q.

A: 9

Q: What is the solution?
Solve 30573 - 4891 = 2091*u - 18229 for u.

A: 21

Q: What is the solution?
Solve -20*l + 41*l - 437 = 2*l for l.

A:
23