x : 6/7 - x = 2/3
x : 6/7 - x : 1 = 2/3
x : ( 6/7 - 1 ) = 2/3
x : -1/7 = 2/3
x = 2/3 x -1/7
x = -2/21
tk mk nhé
\(\frac{6}{7}-x=\frac{2}{3}\)
\(x=\frac{6}{7}-\frac{2}{3}\)
\(x=\frac{18}{21}-\frac{14}{21}\)
\(x=\frac{18-14}{21}\)
\(x=\frac{4}{21}\)
Ta có : \(x:\frac{6}{7}-x=\frac{2}{3}\)
\(\Rightarrow\) \(x\)x \(\frac{7}{6}-x=\frac{2}{3}\)
\(\Rightarrow\) \(x\)x \(\left(\frac{7}{6}-1\right)=\frac{2}{3}\)
\(\Rightarrow\) \(x\)x \(\frac{1}{6}=\frac{2}{3}\)
\(\Rightarrow\) \(x=\frac{2}{3}:\frac{1}{6}\)
\(\Rightarrow\) \(x=4\)
Vậy x=4
~ Chúc ai tk cho mk thi đật điểm cao ~
\(x:\frac{6}{7}-x=\frac{2}{3}\)\(\Rightarrow x\times\frac{7}{6}-x=\frac{2}{3}\)\(\Rightarrow x\times\left(\frac{7}{6}-1\right)=\frac{2}{3}\)\(\Rightarrow x\times\frac{1}{6}=\frac{2}{3}\)
\(\Rightarrow x=\frac{2}{3}:\frac{1}{6}\Rightarrow x=4\)
\(\frac{6}{7}-x=\frac{2}{3}\) \(x=\frac{6}{7}-\frac{2}{3}\) \(x=\frac{4}{21}\)