SOLUTION
Given the question in the image, the following are the solution steps to answer the question.
STEP 1: Write the given equation
[tex]A=\frac{1}{2}bh[/tex]STEP 2: Multiply through by 2
[tex]\begin{gathered} 2\cdot A=2\cdot\frac{1}{2}\cdot b\cdot h \\ 2A=bh \end{gathered}[/tex]STEP 3: Divide both sides by b
[tex]\begin{gathered} \frac{2A}{h}=\frac{bh}{h} \\ b=\frac{2A}{h} \end{gathered}[/tex]Hence, the value of b can be gotten by the equation:
[tex]\frac{2A}{h}[/tex]