Q: Solve 15 + 179 - 5 = -27*z for z.

A: -7

Q: Solve d - 18*d = -2*d - 30 for d.

A: 2

Q: Solve 11*w + 81 = 4 for w.

A: -7

Q: Solve 0 = 39*f + 9*f + 48 for f.

A:
-1