Question

Tìm y 

Y x 13/15. = 2/3 x 7/6

Answer 1

y \(\times\) \(\dfrac{13}{15}\) = \(\dfrac{2}{3}\) \(\times\) \(\dfrac{7}{6}\)

y \(\times\) \(\dfrac{13}{15}\) = \(\dfrac{14}{18}\)

y \(\times\) \(\dfrac{13}{15}\) = \(\dfrac{7}{9}\)

y            = \(\dfrac{7}{9}\) : \(\dfrac{13}{15}\)

y           =  \(\dfrac{35}{39}\)

Answer 2

thử lại ta có:

\(\dfrac{35}{39}\) \(\times\) \(\dfrac{13}{15}\) =  \(\dfrac{7}{9}\)

\(\dfrac{2}{3}\) \(\times\) \(\dfrac{7}{6}\) = \(\dfrac{7}{9}\)

Vậy y = \(\dfrac{35}{39}\) là đúng

Answer 3

Y x 13/15 = 2/3 x 7/6

Y x 13/15 = 7/9

Y.               = 7/9 : 13/15

Y.               = 35/39