Problem: Math Problem
Solve 165*b = -171*b + 72*b - 2904 for b.

A: -11

Problem: Math Problem
Solve -81 + 84 = 3*r for r.

A: 1

Problem: Math Problem
Solve 0 = -218*z + 398*z - 217*z + 296 for z.

A:
8