$$8x+4=2(x-1)-10$$
$x = -\frac{8}{3} = -2\frac{2}{3} \approx -2.666666667$
$$8x+4=2x-2-10$$
$$8x+4=2x-12$$
$$8x+4-2x=-12$$
$$6x+4=-12$$
$$6x=-12-4$$
$$6x=-16$$
$$x=\frac{-16}{6}$$
$$x=-\frac{8}{3}$$
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