Q: Solve:
Solve 0 = 90*z + 13811 - 20741 for z.

A: 77

Q: Solve:
Solve -3292*i - 3358*i + 6541*i + 11336 = 0 for i.

A: 104

Q: Solve:
Solve -7*z = -14*z + 21 for z.

A:
3