Question

Resolver por favor!!!!!!!!!!!!!!

Answer 1

Resposta:

$\frac{-7}{30}$

Explicação passo-a-passo:

$( ( \frac{2}{3} . \frac{9}{10} ) - \frac{3}{2} ) - \frac{7}{4} : ( -\frac{21}{8} )$

$( \frac{18}{30} - \frac{3}{2} ) - \frac{7}{4} : ( -\frac{21}{8} )$

$( \frac{-27}{30} ) - \frac{7}{4} : ( -\frac{21}{8} )$

$( \frac{-27}{30} ) - (\frac{7}{4} . -\frac{8}{21} )$

$( \frac{-27}{30} ) - (-\frac{56}{84})$

$\frac{-27}{30} + \frac{56}{84}$

$\frac{-378 + 280}{420}$

$\frac{-7}{30}$