Question

tìm x:

X:1/3=1/2+1/3                      (X:2/3):2/5=7/10

Giúp cháuuuuuu!!!!

Answer 1

1) \(x:\dfrac{1}{3}=\dfrac{1}{2}+\dfrac{1}{3}\)

\(\Rightarrow3\times x=\dfrac{5}{6}\Rightarrow x=\dfrac{5}{18}\)

2) \(\left(x:\dfrac{2}{3}\right):\dfrac{2}{5}=\dfrac{7}{10}\)

\(\Rightarrow\dfrac{3}{2}\times x=\dfrac{7}{10}\times\dfrac{2}{5}=\dfrac{7}{25}\)

\(\Rightarrow x=\dfrac{7}{25}:\dfrac{3}{2}=\dfrac{14}{75}\)

Answer 2

X : 1/3 = 1/2 + 1/3 

X = 5/18

 

( X : 2/3 ) : 2/5 = 7/10

X = 14/75