Question

Afla termenul necunoscut:8/10-(9/10-x)=4/10

Dau coroana

Answer 1

$\dfrac{8}{10}-(\dfrac{9}{10}-x)=\dfrac{4}{10}$
$\dfrac{8}{10}-\dfrac{9}{10}+x=\dfrac{2}{5}$
$\dfrac{8-9}{10}+x=\dfrac{2}{5}$
$\dfrac{-1}{10}+x=\dfrac{2}{5}$
$x=\dfrac{2}{5}+\dfrac{1}{10}$
$x=\dfrac{4+1}{10}$
$x=\dfrac{5}{10}$
=simplifici cu 5=
$x=\dfrac{1}{2}$

$(x=1:2=0,5)$