Q: Solve 1995 = 9*q + 1842 for q.

A: 17

Q: Solve 0 = -38*p - 2*p - 240 for p.

A: -6

Q: Solve 0 = -19*x + x for x.

A: 0

Q: Solve -939*r - 2573 - 4760 = -137*r + 3093 for r.

A:
-13