Problem: Math Problem
Solve -92*r - 151*r - 80*r + 80*r - 2430 = 0 for r.

A: -10

Problem: Math Problem
Solve 13*q = 4*q - 9 for q.

A: -1

Problem: Math Problem
Solve 67*o - 6281 + 7219 = 0 for o.

A:
-14