#### Answer

$x=-5$

#### Work Step by Step

$8x=2(6x+10)\rightarrow$ apply distributive property
$8x=12x+20\rightarrow$ subtract 12x from each side
$8x-12x=12x+20-12x\rightarrow$ combine like terms
$-4x=20\rightarrow$ divide both sides by -4
$-4x\div-4=20\div-4\rightarrow$ simplify
$x=-5$