3/7-1/2x=5/3

Đáp án:

 $\dfrac{3}{7}-\dfrac{1}{2}x=\dfrac{5}{3}$

$⇒ \dfrac{1}{2}x= \dfrac{3}{7}-\dfrac{5}{3}$

$⇒ \dfrac{1}{2}x= -\dfrac{26}{21}$

$⇒ x= -\dfrac{26}{21}:\dfrac{1}{2}$

$⇒ x= -\dfrac{52}{51}$

$\text{Vậy x=}$ $-\dfrac{52}{51}$