Q: Solve:
Solve -4*c + 84 = 17*c for c.

A: 4

Q: Solve:
Solve -27*z - 161*z + 688 = 2568 for z.

A: -10

Q: Solve:
Solve 330*l + 305*l = 117*l - 9842 for l.

A:
-19