Q: Solve 0 = 9*m - 8*m + 5 for m.

A: -5

Q: Solve -136 = 71*a - 562 for a.

A: 6

Q: Solve -19*o + 80 - 4 = 0 for o.

A: 4

Q: Solve 16*v - 43 = 9*v + 20 for v.

A:
9