Answer
$3\frac{2}{3}$
Work Step by Step
We have $$7k-3r$$
Where $k = \frac{2}{3}$, $r=\frac{1}{3}$
Then if you substitute each letter by her value $$7*\frac{2}{3} - 3*\frac{1}{3} = \frac{14}{3} - \frac{3}{3} = \frac{14-3}{3} = \frac{11}{3} = 3\frac{2}{3}$$
