Q: Solve:
Solve 31*r + 26*r - 84*r - 80 = -22*r for r.

A: -16

Q: Solve:
Solve 24*h + 1589 = -21*h - 61*h - 2015 for h.

A: -34

Q: Solve:
Solve 54*u - 40 = 49*u for u.

A:
8