Q: Solve:
Solve -117*z + 103*z = 84 for z.

A: -6

Q: Solve:
Solve 94 - 1422 - 1392 = 170*n for n.

A: -16

Q: Solve:
Solve 0 = 2787*u - 2970*u - 2774 + 29 for u.

A:
-15