$$\frac{ 7x+6 }{ 3 } -9=-12$$
$x = -\frac{15}{7} = -2\frac{1}{7} \approx -2.142857143$
$$7x+6-27=-36$$
$$7x-21=-36$$
$$7x=-36+21$$
$$7x=-15$$
$$x=\frac{-15}{7}$$
$$x=-\frac{15}{7}$$
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