Chapter 4 - Writing Linear Functions - Maintaining Mathematical Proficiency - Page 173: 8

$y=\frac{x}{4}+7$

The given equation is $-x+4y-28=0$ Add $x+28$ on both sides of the equation. Then, we get $-x+4y-28+x+28=x+28$ Or $4y=x+28$ Divide both sides of the equation by $4$. Then, $y=\frac{x+28}{4}=\frac{x}{4}+7$