Trần Hà Linh Đan
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2024-07-17 22:15:36
32788 (mình tính nhẩm á có sai cho xl nha)
2024-05-08 19:47:54
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 = \(\dfrac{1}{6}\)