`x-(4)/(7)xx(14)/(12)=(3)/(5):(21)/(10)`
`x-(4xx7xx2)/(7xx4xx3)=(3)/(5)xx(10)/(21)`
`x-(2)/(3)=(3xx5xx2)/(5xx7xx3)`
`x-(2)/(3)=(2)/(7)`
`x=(2)/(7)+(2)/(3)`
`x=(2xx3+2xx7)/(21)`
`x=(20)/(21)`
\(x-\dfrac{4}{7}\times\dfrac{14}{12}=\dfrac{3}{5}:\dfrac{21}{10}\)
=>\(x-\dfrac{2}{3}=\dfrac{2}{7}\)
=>\(x=\dfrac{2}{7}+\dfrac{2}{3}\)
=>\(x=\dfrac{20}{21}\)
x-\(\dfrac{4}{7}x\dfrac{7}{6}\)= \(\dfrac{2}{7}\)
x-\(\dfrac{4}{7}=\dfrac{2}{7}x\dfrac{7}{6}\)
x-\(\dfrac{4}{7}=\dfrac{1}{3}\)
x= \(\dfrac{1}{3}+\dfrac{4}{7}\)
x= \(\dfrac{19}{21}\)