#### Answer

{2}

#### Work Step by Step

We are given the equation $9x-3(x+1)=8x-7$. In order to solve, first use the distributive property to simplify the left side.
$9x-3x-3=8x-7$
$6x-3=8x-7$
Add 7 to both sides.
$6x+4=8x$
Subtract 6x from both sides.
$2x=4$
Divide by 2.
$x=2$