Intermediate Algebra: Connecting Concepts through Application

4x-3y=20 3y=4x-20 y=$\frac{4}{3}$x-$\frac{20}{3}$ 12x-9y=30 9y=12x-30 y=$\frac{4}{3}$x-$\frac{10}{3}$ Both of the lines have a slope of $\frac{4}{3}$, therefore, the lines are parallel.