Q: Solve:
Solve -3*z + 49 - 55 = 0 for z.

A: -2

Q: Solve:
Solve 318*d - 216*d + 32640 = -378*d for d.

A: -68

Q: Solve:
Solve -50*a - 38*a = 251*a + 1356 for a.

A:
-4