## Elementary Algebra

$x=\dfrac{y+8}{2}$
Using the properties of equality, in terms of $x ,$ the given equation, $y=2(x-4) ,$ is equivalent to \begin{array}{l}\require{cancel} y=2x-8 \\\\ y+8=2x \\\\ \dfrac{y+8}{2}=x \\\\ x=\dfrac{y+8}{2} .\end{array}