\(\dfrac{9}{14}\times7=\dfrac{63}{14}=\dfrac{9}{2}\)
\(\left(\dfrac{5}{7}-\dfrac{1}{14}\right)\times7=\dfrac{9}{14}\times7=\dfrac{9}{2}\)
\(\left(\dfrac{5}{7}-\dfrac{1}{14}\right)x7\)
\(=\dfrac{9}{14}x7\)
=\(=\dfrac{9}{14}x\dfrac{7}{1}\)
=\(\dfrac{9}{2}\)