[tex]Q - 7 \frac{5}{6} = 6 \frac{1}{2} \\ \\ Q - 7 \frac{5}{6} + 7 \frac{5}{6} = 6 \frac{1}{2} + 7 \frac{5}{6} \\ \\ Q = 6 \frac{1*3}{2*3} + 7 \frac{5}{6} \\ \\ Q = 6 + 7 + \frac{3}{6} + \frac{5}{6} \\ \\ Q = 13 + \frac{8}{6} = 13 + \frac{6}{6 } + \frac{2}{6} = 14 \frac{2}{6 } = 14 \frac{1}{3} [/tex]
