Question

Find 5by22+3by7+{-8by21}+{-6by11}

Answer 1

$\frac{5}{22} - \frac{6}{11} + \frac{3}{7} - \frac{3}{21} \\ = \frac{5 - 12}{22} + \frac{9 - 8}{21} \\ = \frac{ - 7}{22} + \frac{1}{21} \\ = \frac{22 - 147}{462} \\ = \frac{125}{462}$