$$\left. \begin{array} { l } { 4 ( y - 3 ) + 9 = 3 ( 2 y - 1 ) + 28 } \end{array} \right.$$
$y=-14$
$$4y-12+9=3\left(2y-1\right)+28$$
$$4y-3=3\left(2y-1\right)+28$$
$$4y-3=6y-3+28$$
$$4y-3=6y+25$$
$$4y-3-6y=25$$
$$-2y-3=25$$
$$-2y=25+3$$
$$-2y=28$$
$$y=\frac{28}{-2}$$
$$y=-14$$
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