Answer:
y = x - 7
Explanation:
The slope-intercept form is y = mx + b
So let's get y on one side and get rid of the rest on the other side!
So far the equation is 4y - 4x = -28. Let's move the -4x over to the other side to get 4y by itself. + 4x to both sides and you get 4y = 4x - 28.
Great! But since y isn't by itself, let's divide both sides by 4 to get rid of the 4 next to the y. Divide 4 from both sides and you get y = x - 7.