\(\dfrac{5}{11}-\left(\dfrac{3}{5}-\dfrac{6}{11}\right)\)
\(=\dfrac{5}{11}-\dfrac{3}{5}+\dfrac{6}{11}\)
\(=\left(\dfrac{5}{11}+\dfrac{6}{11}\right)-\dfrac{3}{5}\)
\(=1-\dfrac{3}{5}\)
\(=\dfrac{5}{5}-\dfrac{3}{5}\)
\(=\dfrac{2}{5}\)
`5/11-(3/5-6/11)`
`=5/11-3/5+6/11`
`=(5/11+6/11)-3/5`
`=1-3/5`
`=2/5`
\(\dfrac{5}{11}-\left[\dfrac{3}{5}-\dfrac{6}{11}\right]\\ =\dfrac{5}{11}-\dfrac{3}{55}=\dfrac{2}{5}\)