x+7/3x=2/3
=> x.(7/3+1)=2/3
=>x .10/3=2/3
=>x =2/3:10/3
=> x =2/3.3/10
=> x =1/5
Vậy x=1/5
x + \(\dfrac{7}{3}x=\dfrac{2}{3}\)
\(\Rightarrow\) x . \(\left(1+\dfrac{7}{3}\right)=\dfrac{2}{3}\)
\(\Rightarrow x.\dfrac{10}{3}=\dfrac{2}{3}\)
\(\Rightarrow x=\dfrac{2}{3}:\dfrac{10}{3}\)
\(\Rightarrow\dfrac{2}{3}.\dfrac{3}{10}=x\)
\(\Rightarrow x=\dfrac{2.3}{3.2.5}\)
\(\Rightarrow x=\dfrac{1}{5}\)
Lời giải:
\(x+\dfrac{7}{3}x=\dfrac{2}{3}\)
\(\Rightarrow\left(1+\dfrac{7}{3}\right)x=\dfrac{2}{3}\)
\(\Rightarrow\dfrac{10}{3}x=\dfrac{2}{3}\)
\(\Rightarrow x=\dfrac{2}{3}.\dfrac{3}{10}\)
\(\Rightarrow x=\dfrac{1}{5}\)
x+ 7/3x=2/3
x.(7/3+1)=2/3
x.10/3 =2/3
x =2/3:10/3
x =1/5
\(x+\dfrac{7}{3}x=\dfrac{2}{3}\)
\(\left(1+\dfrac{7}{3}\right)x=\dfrac{2}{3}\)
\(\left(\dfrac{3}{3}+\dfrac{7}{3}\right)x=\dfrac{2}{3}\)
\(\dfrac{10}{3}x=\dfrac{2}{3}\)
\(x=\dfrac{2}{3}:\dfrac{10}{3}\)
\(x=\dfrac{2}{3}\cdot\dfrac{3}{10}\)
\(x=\dfrac{1}{5}\)
Vậy \(x=\dfrac{1}{5}\).
