Q: What is the solution?
Solve 7746 + 5450 = 635*r - 987 - 4867 for r.

A: 30

Q: What is the solution?
Solve 0 = 48*u + 430 - 1409 - 413 for u.

A: 29

Q: What is the solution?
Solve 84 = -16*b - 12*b for b.

A:
-3