=>2/3:x=2/3-1/5=7/15
=>x=2/3:7/15=2/3x15/7=30/21=10/7
`4/6 - 2/3:x= 1/5`
`=> 2/3:x=4/6 - 1/5`
`=> 2/3:x=20/30 - 6/30`
`=> 2/3:x=14/30`
`=> 2/3:x=7/15`
`=>x= 2/3 : 7/15`
`=> x= 2/3 . 15/7`
`=>x= 10/7`
\(\dfrac{4}{6}-\dfrac{1}{3}:x=\dfrac{1}{5}\Rightarrow\dfrac{1}{3}:x=\dfrac{4}{6}-\dfrac{1}{5}=\dfrac{7}{15}\Rightarrow x=\dfrac{1}{3}:\dfrac{7}{15}=\dfrac{5}{7}\)