Solve 39*a - 31 = 398 for a.
Solve this plz.

A: 11

Solve -27*x + 129*x - 805 = 67*x for x.
Solve this plz.

A: 23

Solve 16*t - 5*t + 11 = 0 for t.
Solve this plz.

A:
-1