Solve 18810 = 3984066*a - 3984408*a for a.
Solve this plz.

A: -55

Solve 85*x - 83*x = 0 for x.
Solve this plz.

A: 0

Solve 0 = -31*f + 12*f - 57 for f.
Solve this plz.

A:
-3