2/3x - 2/5 = 1/2 - 1/3
2/3x-2/5 = 1/6
2/3x = 1/6 + 2/5
2/3x = 17/30
x = 17/30 : 2/3
x = 17/20
vậy x = 17/20
\(\frac{2}{3x}-\frac{2}{5}=\frac{1}{6}\)
\(\frac{2}{3x}=\frac{1}{6}+\frac{2}{5}\)
\(\frac{2}{3x}=\frac{17}{30}\)
\(\Rightarrow\)2.30 = 3x.17
60 = 3x.17
60 : 17 = 3x
\(\frac{60}{17}=3x\)
\(\frac{30}{17}:3=x\)
\(\frac{10}{17}=x\)
\(\frac{2}{3}x-\frac{2}{5}=\frac{1}{2}-\frac{1}{3}\)
<=> \(\frac{2}{3}x-\frac{2}{5}=\frac{1}{6}\)
<=> \(\frac{2}{3}x=\frac{1}{6}+\frac{2}{5}\)
<=> \(\frac{2}{3}x=\frac{17}{30}\)
<=> \(x=\frac{17}{30}:\frac{2}{3}\)
<=> \(x=\frac{17}{20}\)
í thôi chết mình sai đề bài ! chỗ 1/2 là 1/2x cơ...
