5/4x(X-3/5)=-1/8 tìm x trong ngoặc ét ô ét

Đáp án:

 $\dfrac{5}{4}.(x-\dfrac{3}{5})=-\dfrac{1}{8}$

$⇒x-\dfrac{3}{5}= \dfrac{-1}{8}.\dfrac{4}{5}$

$⇒x-\dfrac{3}{5}=\dfrac{-4}{40}$

$⇒x- \dfrac{3}{5}=-\dfrac{1}{10}$

$⇒x= \dfrac{-1}{10}+\dfrac{3}{5}$

$⇒x= \dfrac{-1}{10}+\dfrac{6}{10}$

$⇒x= \dfrac{5}{10}$

$⇒x=\dfrac{1}{2}$

Vậy  $x=\dfrac{1}{2}$