Answer
$m=-3; b=-2n$
Work Step by Step
We need to put the equation in the form y=mx+b:
$ 2y+4n=-6x \\\\ 2y=-6x-4n \\\\ y=-3x-2n$
In order to figure out what the slope is, we must figure out what x is being multiplied by. x is being multiplied by -3, so we know that m, the slope, is -3. We now must figure out what is being added to x. -2n is being added to x, so we know that b, the y intercept, is -2n.
