Solve for b:
A = 2/3mb

Answer: [tex]b=\frac{3A}{2m}[/tex]
Step-by-step explanation:
To solve for b, we want to get it alone.
[tex]A=\frac{2}{3}mb[/tex] [multiply both sides by 3/2]
[tex]\frac{3}{2}A=mb[/tex] [divide both sides by m]
[tex]b=\frac{3A}{2m}[/tex]
Therefore, we know that [tex]b=\frac{3A}{2m}[/tex].