Question

1/2.(-3/4)-1/2.(7/6)

Answer 1

$\frac{1}{2} ( \frac{-3}{4}) - \frac{1}{2} ( \frac{7}{6} )$
$\frac{-3}{8} - \frac{7}{12}$
$\frac{-9-14}{24}$
$\frac{-23}{24}$

Espero ter ajudado ;)