Question

What should be added to (2/7 + 9/5) to get -2/15​

Answer 1

$( \frac{2}{7} + \frac{9}{5} ) + x = \frac{ - 2}{15} \\ \\ ( \frac{10 + 63}{35} ) + x = \frac{ - 2}{15} \\ \\ \frac{73}{35} + x = \frac{ - 2}{15} \\ \\ x = \frac{ - 2}{15} - \frac{73}{35} \\ \\ x = \frac{ - 14 - 219}{105} \\ \\ x = \frac{ - 233}{105}$

Answer 2

$( \frac{2}{7} + \frac{9}{5} ) + x = \frac{ - 2}{15} \\ \\ ( \frac{10 + 63}{35} ) + x = \frac{ - 2}{15} \\ \\ \frac{73}{35} + x = \frac{ - 2}{15} \\ \\ x = \frac{ - 2}{15} - \frac{73}{35} \\ \\ x = \frac{ - 14 - 219}{105} \\ \\ x = \frac{ - 233}{105}$