Problem: Math Problem
Solve -221*u + 2428 = 917 - 3572 for u.

A: 23

Problem: Math Problem
Solve 12*v - 71 = -6*v + 55 for v.

A: 7

Problem: Math Problem
Solve 16*r - 7 + 71 = 0 for r.

A:
-4