Question

Biết: \(\dfrac{2}{5}\): x = \(\dfrac{7}{10}\). Vậy giá trị của x là bao nhiêu? 

Answer 1

\(\dfrac{4}{7}\)

Answer 2

\(\Rightarrow x=\dfrac{2}{5}:\dfrac{7}{10}=\dfrac{2}{5}\times\dfrac{10}{7}=\dfrac{4}{7}\)

Answer 3

\(x=\dfrac{2}{5}:\dfrac{7}{10}\\ x=\dfrac{2}{5}.\dfrac{10}{7}\\ x=\dfrac{4}{7}\)

Answer 4

\(x=\dfrac{2}{5}\)x\(\dfrac{10}{7}\)

\(x=\dfrac{4}{7}\)

Answer 5

4 / 7

Answer 6

=\(\dfrac{4}{7}\)

Answer 7

`2/5:x=7/10`

`\(\Leftrightarrow\)x=2/5:7/10`

`\(\Leftrightarrow\)x=2/5.10/7`

`\(\Leftrightarrow\)x=4/7`

Answer 8

x = \(\dfrac{2}{5}\) : \(\dfrac{7}{10}\)

x = \(\dfrac{2}{5}\) × \(\dfrac{10}{7}\)

x = \(\dfrac{4}{7}\)