Solve -410*b = 917*b + 537*b - 27960 for b.
Solve this plz.

A: 15

Solve 34*h + 433 = 161 for h.
Solve this plz.

A: -8

Solve 21*i - 23*i + 4 = 0 for i.
Solve this plz.

A:
2