$$\left. \begin{array} { l } { - 3 x + y = 52 - 4 = } \\ { \text { E s t h e c h e c h e c h e c h e d e \right.$$
$x=\frac{y-48}{3}$
$$-3x+y=48$$
$$-3x=48-y$$
$$\frac{-3x}{-3}=\frac{48-y}{-3}$$
$$x=\frac{48-y}{-3}$$
$$x=\frac{y}{3}-16$$
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