Question

ME explique como resolver detalhadamente por favor !!

=(2/5 . 5/3 + 1) . ( 7/10 . 1/7 + 1/2) + 2/15

Answer 1

$\mathsf{( \frac{2}{\not 5}* \frac{\not 5}{3} +1)( \frac{\not7}{10}* \frac{1}{\not7}+ \frac{1}{2})+ \frac{2}{5}} \\ \\ \mathsf{( \frac{2}{3}+1)( \frac{1}{10}+ \frac{1}{2})+ \frac{2}{5}} \\ \\ \mathsf{( \frac{5}{\not3})( \frac{\not6}{10})+ \frac{2}{5}} \\ \\ \mathsf{ \frac{10}{10}+ \frac{2}{5}= \boxed{\boxed{\mathsf{\frac{14}{10}}}}} \\ \\ \\ \mathsf{Em~decimal, fica~\boxed{\mathsf{1,4}}}$