Problem: Math Problem
Solve -690*u - 546 = 671*u - 1335*u for u.

A: -21

Problem: Math Problem
Solve -7640*a = -7632*a + 72 for a.

A: -9

Problem: Math Problem
Solve -t + 19*t + 9*t + 270 = 0 for t.

A:
-10