Solve 15*x + 15*x = 270 for x.
Solve this plz.

A: 9

Solve 4260*b - 2424*b - 2105*b + 4304 = 0 for b.
Solve this plz.

A: 16

Solve 200*j - 565 = 235 for j.
Solve this plz.

A:
4