Question

x cia 3 phần 4 bằng 1 trừ 2 phần 5 

 

Answer 1

\(x:\dfrac{3}{4}=1-\dfrac{2}{5}\\ \Rightarrow x\cdot\dfrac{4}{3}=\dfrac{3}{5}\\ \Rightarrow x=\dfrac{3}{5}:\dfrac{4}{3}=\dfrac{9}{20}\)

Answer 2

\(x:\dfrac{3}{4}=1-\dfrac{2}{5}\)

\(\Rightarrow x:\dfrac{3}{4}=\dfrac{3}{5}\)

\(\Rightarrow x=\dfrac{3}{5}\times\dfrac{3}{4}\)

\(\Rightarrow x=\dfrac{9}{20}\)

Answer 3

x:3/4=1-2/5

x:3/4=3/5

x=3/5x3/4

x=9/20

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