AHSME 1980 Problem 3

If the ratio of $2x-y$ to $x+y$ is $\frac{2}{3}$, what is the ratio of $x$ to $y$? $\text{(A)} \ \frac{1}{5} \text{(B)} \ \frac{4}{5} \text{(C)} \ 1 \text{(D)} \ \frac{6}{5} \text{(E)} \ \frac{5}{4}$