Question

tìm x biết 2/5 nhân x = 4/7 chia 2/3

 

Answer 1

\(\dfrac{2}{5}\cdot x=\dfrac{4}{7}:\dfrac{2}{3}\)

\(\dfrac{2}{5}\cdot x=\dfrac{6}{7}\)

\(x=\dfrac{6}{7}:\dfrac{2}{5}\)

\(x=\dfrac{15}{7}\)

Answer 2

\(\dfrac{2}{5}.x=\dfrac{4}{7}:\dfrac{2}{3}\)

\(\dfrac{2}{5}.x=\dfrac{4}{7}.\dfrac{3}{2}\)

\(\dfrac{2}{5}.x=\dfrac{6}{7}\)

\(x=\dfrac{6}{7}:\dfrac{2}{5}\)

\(x=\dfrac{6}{7}.\dfrac{5}{2}=\dfrac{15}{7}\)