Question

Tìm y biết 

Y*3/7=13/15-2/5

Answer 1

y x 3/7 = 13/15 - 2/5

y x 3/7 = 7/15

         y = 7/15 : 3/7

         y = 49/45

Vậy y = 49/45

Answer 2

\(Y\cdot\frac{3}{7}=\frac{13}{15}-\frac{2}{5}\)

=>\(Y\cdot\frac{3}{7}=\frac{7}{15}\)

=>\(Y=\frac{7}{15}:\frac{3}{7}=\frac{49}{45}\)

(  dấu . là * đó)