Question

[Lê Hoàng Yến]

0,3 × (y + 1/3) = 1/2 × (0,81 :2,7)

Answer 1

[Nguyễn Lê Phước Thịnh]

\(0,3\times\left(y+\dfrac{1}{3}\right)=\dfrac{1}{2}\times\left(0,81:2,7\right)\)

=>\(0,3\times\left(y+\dfrac{1}{3}\right)=\dfrac{1}{2}\times0,3\)

=>\(y+\dfrac{1}{3}=\dfrac{1}{2}\)

=>\(y=\dfrac{1}{2}-\dfrac{1}{3}=\dfrac{1}{6}\)

Answer 2

[Trần Hà Linh Đan]

Đề bài : 0,3 x ( y + \(\dfrac{1}{3}\) ) = \(\dfrac{1}{2}\) x ( 0,81 : 2,7)

\(\dfrac{3}{10}\) x ( y + \(\dfrac{1}{3}\)  ) = \(\dfrac{1}{2}\)  x ( \(\dfrac{81}{100}\) : \(\dfrac{27}{10}\))

\(\dfrac{3}{10}\) x ( y + \(\dfrac{1}{3}\)  ) = \(\dfrac{1}{2}\) x ( \(\dfrac{81}{100}\) x \(\dfrac{10}{27}\) )

\(\dfrac{3}{10}\) x ( y + \(\dfrac{1}{3}\)  ) = \(\dfrac{1}{2}\) x \(\dfrac{3}{10}\)

  \(\dfrac{3}{10}\) x ( y + \(\dfrac{1}{3}\)  ) = \(\dfrac{3}{20}\)               y + \(\dfrac{1}{3}\) = \(\dfrac{3}{20}\)  : \(\dfrac{3}{10}\) = \(\dfrac{3}{20}\) x \(\dfrac{10}{3}\)               y + \(\dfrac{1}{3}\) = \(\dfrac{1}{2}\)                    y   = \(\dfrac{1}{2}\) - \(\dfrac{1}{3}\)                    y   = \(\dfrac{3}{6}\) - \(\dfrac{2}{6}\)                    y   = \(\dfrac{1}{6}\)