Solve -3855*b - 10469 = -4391 + 27784 + 12398 for b.
Solve this plz.

A: -12

Solve 2502*f = 2475*f - 675 for f.
Solve this plz.

A: -25

Solve -18*z - 11 = 25 for z.
Solve this plz.

A:
-2