Problem: Math Problem
Solve 259*r + 130*r - 109*r - 13160 = 0 for r.

A: 47

Problem: Math Problem
Solve -4536 = -1777*w + 2572 for w.

A: 4

Problem: Math Problem
Solve 3*a - 22 = -17 + 34 for a.

A:
13