Q: What is the solution?
Solve 117 = 67*w - 84 for w.

A: 3

Q: What is the solution?
Solve 1386*u + 310 = 668*u + 687*u for u.

A: -10

Q: What is the solution?
Solve 27*b = 29*b - 4 for b.

A:
2