$$4 ( 2 x - 3 ) = 8 ( 2 x + 5 )$$
$x = -\frac{13}{2} = -6\frac{1}{2} = -6.5$
$$8x-12=8\left(2x+5\right)$$
$$8x-12=16x+40$$
$$8x-12-16x=40$$
$$-8x-12=40$$
$$-8x=40+12$$
$$-8x=52$$
$$x=\frac{52}{-8}$$
$$x=-\frac{13}{2}$$
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