Problem: Math Problem
Solve 6920 = 162743*s - 162570*s for s.

A: 40

Problem: Math Problem
Solve 0 = -849*r - 1271*r + 72080 for r.

A: 34

Problem: Math Problem
Solve 22 - 92 = 17*k - 36 for k.

A:
-2