Q: Solve 0 = 22*y - 6*y + 80 for y.

A: -5

Q: Solve 73*m - 77*m - 20 = 0 for m.

A: -5

Q: Solve 1157*z - 169 = 1144*z for z.

A: 13

Q: Solve 30 = 4*d + 2 for d.

A:
7