Q: Solve:
Solve -56*z = -61*z - 25 for z.

A: -5

Q: Solve:
Solve 0 = -2068*q + 2094*q - 130 for q.

A: 5

Q: Solve:
Solve -2840*i = -2781*i + 1180 for i.

A:
-20