Q: Solve -31*w = -36*w - 30 for w.

A: -6

Q: Solve 2*t - 140 - 142 = -264 for t.

A: 9

Q: Solve 13 = 4*n + 25 for n.

A: -3

Q: Solve -66*v + 8*v = -174 for v.

A:
3