Question

in the formula A=1/2h•b solve for b

Answer 1

hello

to solve this problem, we'll make b the subject of formula

$a=\frac{1}{2}h\times b$

step 1

multiply both sides by 2

this is done so as to eliminate 1/2 on that side of the equation

$\begin{gathered} a=\frac{1}{2}h\times b \\ 2\times a=2\times(\frac{1}{2}hb) \\ 2a=hb \end{gathered}$

step 2

divide both sides by h

this done to make b the subject of formula

$\begin{gathered} 2a=hb \\ \text{divide both sides by h} \\ \frac{2a}{h}=\frac{hb}{h} \\ b=\frac{2a}{h} \end{gathered}$

therefore, b = 2a / h