#### Answer

$3x-7y=28$

#### Work Step by Step

The general form of a line is defined as $Ax+By=C$. First, multiply both sides of the equation by the least common denominator of all the terms. Then bring the $x$-term over to the left side of the equation.
$y=\frac{3}{7}x-4$
$7(y)=7(\frac{3}{7}x-4)$
$7y=3x-28$
$-3x+7y=-28$
$3x-7y=28$