$$\frac{ 3x }{ 2 } +9=12- \frac{ x }{ 3 }$$
$x = \frac{18}{11} = 1\frac{7}{11} \approx 1.636363636$
$$3\times 3x+54=72-2x$$
$$9x+54=72-2x$$
$$9x+54+2x=72$$
$$11x+54=72$$
$$11x=72-54$$
$$11x=18$$
$$x=\frac{18}{11}$$
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