Question

Tìm x, biết: 4/5 . x = 4/7

Answer 1

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

\(\Leftrightarrow x=\dfrac{4}{7}\div\dfrac{4}{5}\)

\(\Leftrightarrow x=\dfrac{4}{7}\times\dfrac{5}{4}\)

\(\Leftrightarrow x=\dfrac{5}{7}\)

Answer 2

x=4/7:4/5

x=4/7.5/4

x=5/7(rút gọn)

Answer 3

x=4/7:4/5

x=4/7.5/4

x=5/7