Q: Solve 0 = 9*r + 7706224 - 7706170 for r.

A: -6

Q: Solve -2*z = -0*z + 6 for z.

A: -3

Q: Solve 115*o - 28 = 122*o for o.

A: -4

Q: Solve 4959 = 112*x + 4175 for x.

A:
7