Q: Solve 0 = 13*u + 6*u + 114 for u.

A: -6

Q: Solve 187 = -6*u + 223 for u.

A: 6

Q: Solve 779*y - 90 = 1574*y - 780*y for y.

A: -6

Q: Solve 6*b - 86 = -50 for b.

A:
6