Question

Determine o valor de x, sendo x = -2/5 - ( - 1/2 + 3/4 ) × 0,5

Answer 1

$x= -\frac{2}{5} - (- \frac{1}{2} + \frac{3}{4}) * 0,5$
$x = -\frac{2}{5} ( \frac{1}{4}) * \frac{1}{2}$
$x= -\frac{2}{5} - (\frac{1}{8})$
$x = \frac{-16 - 5}{ 40}$
$x = \frac{-21}{40}$