Q: Solve 0 = 2*z - 82 + 78 for z.

A: 2

Q: Solve -71*d - 186*d + 5040 = 163*d for d.

A: 12

Q: Solve -57*h + 81*h - 192 = 0 for h.

A: 8

Q: Solve 0 = 21*q + 540 - 729 for q.

A:
9