Solve 445*f + 399*f = 5811 + 4317 for f.
Solve this plz.

A: 12

Solve 3152 = -12*l + 3068 for l.
Solve this plz.

A: -7

Solve 290*t - 17427 - 1628 = 805*t for t.
Solve this plz.

A:
-37