Q: Solve 0 = -17*d + 18*d + 8*d + 117 for d.

A: -13

Q: Solve 106*x - 363 = -257*x for x.

A: 1

Q: Solve 84*c - 199*c = -58*c - 1881 for c.

A: 33

Q: Solve 12*a + 520 = -38*a - 2*a for a.

A:
-10