[tex]-\frac{5}{6} x + \frac{4}{9} + \frac{2}{3} x +\frac{1}{3}=-\frac{5}{6} x + \frac{4}{9} + \frac{4}{6} x +\frac{3}{9}=-\frac{1}{6} x + \frac{7}{9}[/tex]
