Q: Solve:
Solve -1107 = -60*l - 83*l + 609 for l.

A: 12

Q: Solve:
Solve 0 = -1503*r + 1334*r - 7943 for r.

A: -47

Q: Solve:
Solve 2938*w = 1849*w + 1883*w - 1588 for w.

A:
2