We need to evaluate the following expression:
[tex]S=4LW+2WH[/tex]
Where S is equal to 108, L is equal to 7 and W is equal to 3. We have:
[tex]\begin{gathered} 108=4\cdot7\cdot3+2\cdot3\cdot H \\ 108=84+6\cdot H \\ 84+6\cdot H=108 \\ 6\cdot H=108-84 \\ 6\cdot H=24 \\ H=\frac{24}{6}=4 \end{gathered}[/tex]
