=\(\dfrac{6}{7}+\dfrac{2}{11}-\dfrac{6}{7}\)
=\(\dfrac{6}{7}-\dfrac{6}{7}+\dfrac{2}{11}\)
=\(0+\dfrac{2}{11}\)
=\(\dfrac{2}{11}\)
\(\dfrac{6}{7}+(\dfrac{2}{11}-\dfrac{6}{7})\)
= \(\dfrac{6}{7}+\dfrac{2}{11}-\dfrac{6}{7}\)
=\((\dfrac{6}{7}-\dfrac{6}{7})+\dfrac{2}{11}\)
= \(0+\dfrac{2}{11}\)
=\(\dfrac{2}{11}\)