Q: Solve:
Solve -3*l + 109 = 109 for l.

A: 0

Q: Solve:
Solve -207*d - 102 = -397*d + 224*d for d.

A: -3

Q: Solve:
Solve -64*s = 266*s + 456 + 2260 - 406 for s.

A:
-7