Question

If $[\frac{-2}{5}+\frac{1}{5}]-\frac{2}{3}=\frac{-m}{15}$.Find $m$

Answer 1

$\left(\right(\frac{-2}{5})+(\frac{1}{5}\left)\right)-\left(\frac{2}{3}\right)=\left(\frac{-m}{15}\right)\left(\frac{-2+1}{5}\right)-\left(\frac{2}{3}\right)=\left(\frac{-m}{5}\right)\left(\frac{-1}{5}\right)-\left(\frac{2}{3}\right)=\left(\frac{-m}{5}\right)\left(\frac{-3-10}{15}\right)=\left(\frac{-m}{15}\right)\therefore m=+13$