$$\frac{ 4(x-16) }{ 16 } =9$$
$x=52$
$$4\left(x-16\right)=9\times 16$$
$$4x-64=9\times 16$$
$$4x-64=144$$
$$4x=144+64$$
$$4x=208$$
$$x=\frac{208}{4}$$
$$x=52$$
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