Answer
$2$
Work Step by Step
The given expression, $
\dfrac{7}{5}-\left( \dfrac{9}{10}-\dfrac{3}{2} \right)
,$ simplifies to
\begin{array}{l}\require{cancel}
\dfrac{7}{5}-\left( \dfrac{9}{10}-\dfrac{15}{10} \right)
\\\\=
\dfrac{7}{5}-\left( \dfrac{9-15}{10} \right)
\\\\=
\dfrac{7}{5}-\left( \dfrac{-6}{10} \right)
\\\\=
\dfrac{7}{5}-\left( \dfrac{-3}{5} \right)
\\\\=
\dfrac{7}{5}+\dfrac{3}{5}
\\\\=
\dfrac{7+3}{5}
\\\\=
\dfrac{10}{5}
\\\\=
2
.\end{array}
