Q: Solve:
Solve 15 = 134*y - 168 - 353 for y.

A: 4

Q: Solve:
Solve 5640*d - 5639*d = -3 for d.

A: -3

Q: Solve:
Solve -267*s + 3918 - 11854 = -19*s for s.

A:
-32