Question

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

Answer 1

dấu chấm là dấu nhân nha

\(x-\dfrac{1}{2}\cdot\dfrac{2}{3}=\dfrac{2}{7}\\ x-\dfrac{1}{3}=\dfrac{2}{7}\\ x=\dfrac{2}{7}+\dfrac{1}{3}\\ x=\dfrac{6}{21}+\dfrac{7}{21}\\ x=\dfrac{13}{21}\)

 

 

 

 

 

 

 

 

 

 

 

Answer 2

\(x-\dfrac{1}{2}\times\dfrac{2}{3}=\dfrac{2}{7}\)

       \(x-\dfrac{1}{3}=\dfrac{2}{7}\)

              \(x=\dfrac{2}{7}+\dfrac{1}{3}\)

              \(x=\dfrac{13}{21}\)