Q: Solve 5*f + 63 + 1 - 4 = 0 for f.

A: -12

Q: Solve 90*d - 18846 = -126*d + 565*d for d.

A: -54

Q: Solve 162 = 1222*q - 1216*q for q.

A: 27

Q: Solve -118743 - 161378 = -6299*p - 15563 for p.

A:
42