Q: Solve 25*y - 39*y - 51 = -31*y for y.

A: 3

Q: Solve 45*q - 90*q = 63*q - 1512 for q.

A: 14

Q: Solve 25 = -4*d + 29 for d.

A: 1

Q: Solve -12*f - 24 = 12 for f.

A:
-3