Problem: Math Problem
Solve 483*u + 3566 - 4350 = 6461 for u.

A: 15

Problem: Math Problem
Solve -174 = 19*b - 155 for b.

A: -1

Problem: Math Problem
Solve 0 = -76*r - 192*r - 341*r - 400*r + 74666 for r.

A:
74