#### Answer

$x=5$

#### Work Step by Step

$23x+8-25x=7-9\rightarrow$ combine like terms
$-2x+8=-2\rightarrow$ subtract 8 from each side
$-2x+8-8=-2-8\rightarrow$ simplify
$-2x=-10\rightarrow$ divide each side by -2
$-2x\div-2=-10\div-2\rightarrow$ simplify
$x=5$