Question

A= 1/3BH solve for B

Answer 1

The given formula is

$A=\frac{1}{3}\cdot B\cdot H$

First, we multiply the equation by 3.

$\begin{gathered} 3A=3\cdot\frac{1}{3}\cdot B\cdot H \\ 3A=B\cdot H \end{gathered}$

Then, we divide the equation by H

$\begin{gathered} \frac{3A}{H}=\frac{B\cdot H}{H} \\ \frac{3A}{H}=B \end{gathered}$

Therefore, the solution to B is

$B=\frac{3A}{H}$