Solve -2805 = -20*x + 16*x - 2989 for x.
Solve this plz.

A: -46

Solve -7*z + 37*z = 30 for z.
Solve this plz.

A: 1

Solve 13*b + 16*b = 39*b for b.
Solve this plz.

A:
0