$$\frac{ 2 }{ 3 } \frac { x } { } +7= \frac{ 4 }{ 3 } x+9$$
$x=-3$
$$2x+21=4x+27$$
$$2x+21-4x=27$$
$$-2x+21=27$$
$$-2x=27-21$$
$$-2x=6$$
$$x=\frac{6}{-2}$$
$$x=-3$$
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