Q: Solve:
Solve -3*p = 21*p + 4*p + 168 for p.

A: -6

Q: Solve:
Solve 10 = -8282*p + 8322*p + 410 for p.

A: -10

Q: Solve:
Solve -10*n - 26959 = -27159 for n.

A:
20