Q: Solve:
Solve -163*n - 48885 = 219*n - 62255 for n.

A: 35

Q: Solve:
Solve 195*d - 1803 = 5997 for d.

A: 40

Q: Solve:
Solve 18*r = -3*r - 12 + 96 for r.

A:
4