Solve -538*n - 7031 = -17880 - 4753 for n.
Solve this plz.

A: 29

Solve 20 - 12 = -8*d for d.
Solve this plz.

A: -1

Solve 0 = 3688*b - 595*b + 6054*b + 68656 + 141725 for b.
Solve this plz.

A:
-23