Problem: Math Problem
Solve 15 = -9*a + 6 for a.

A: -1

Problem: Math Problem
Solve 227*t + 6539 = -8807 + 1485 - 4299 for t.

A: -80

Problem: Math Problem
Solve 7*s - 21*s - 754 = 10*s + 206 for s.

A:
-40