#### Answer

{all real numbers}

#### Work Step by Step

We are given the equation $x+9+7x=4(3+2x)-3$. In order to solve, first use the distributive property to simplify the right side.
$x+9+7x=12+8x-3$
$8x+9=8x+9$
Both sides have equal components. Therefore, $x$ will have a solution for all real numbers.