Q: Solve 0 = 6*x - 18 + 66 for x.

A: -8

Q: Solve 3442 = 1160*r - 16278 for r.

A: 17

Q: Solve -10327*i = -6152*i - 20875 for i.

A: 5

Q: Solve 13*z + 0 - 13 = 0 for z.

A:
1