Question

Resolva a expressão utilizando as operações com números racionais​

Answer 1

$\frac{2}{5}(\frac{14}{12}+ \frac{2}{6})-\frac{3}{4}(\frac{\frac{15}{9}}{\frac{1}{2}})$

$\frac{2}{5}(\frac{14}{12}+\frac{4}{12})-\frac{3}{4}.\frac{15}{9}.2$

$\frac{2}{5}.\frac{18}{12}- \frac{90}{36}$

$\frac{36}{60}-\frac{90}{36}$

$\frac{3}{5} -\frac{5}{2}$

$\frac{6}{10}-\frac{25}{10}$

$-\frac{19}{10}$