Q: Solve -31*c = -44*c + 39 for c.

A: 3

Q: Solve -537*o + 277*o + 340*o - 1793 = -113 for o.

A: 21

Q: Solve -3279 - 3194 = 309*w + 16 for w.

A: -21

Q: Solve -817*d - 2218 = 1237 + 1029 + 2052 for d.

A:
-8