x : 4/5 = 6/7 - 3/7
x : 4/5 = 3/7
x = 3/7 x 4/5
x = 12/35
\(\dfrac{6}{7}-\left(x\div\dfrac{4}{5}\right)=\dfrac{3}{7}\)
\(x\div\dfrac{4}{5}=\dfrac{6}{7}-\dfrac{3}{7}\)
\(x\div\dfrac{4}{5}=\dfrac{3}{7}\)
\(x=\dfrac{3}{7}\times\dfrac{4}{5}\)
\(x=\dfrac{12}{35}\)
6/7 - ( x : 4/5 ) = 3/7
x : 4/5 = 6/7 - 3/7
x : 4/5 = 3/7
x = 3/7 x 4/5
x = 12/35