Question

7/5;x=25/37x13/21cộng 2/7x13/21

 

Answer 1

\(\dfrac{7}{5}:x=\dfrac{25}{37}.\dfrac{13}{21}+\dfrac{2}{7}.\dfrac{13}{21}\)

\(\dfrac{7}{5}:x=\dfrac{13}{21}.\left(\dfrac{25}{37}+\dfrac{2}{7}\right)\)

\(\dfrac{7}{5}:x=\dfrac{1079}{1813}\)

\(x=\dfrac{12691}{5395}\)