\(=\left(\dfrac{3.4+9}{8}\right)\times2=\dfrac{21}{8}\times2=\dfrac{21}{4}\)
\(\left(\dfrac{3}{2}+\dfrac{9}{8}\right) . 2=\left(\dfrac{12}{8}+\dfrac{9}{8}\right) . 2=\dfrac{21}{8} . 2=\dfrac{21 . 2}{8}=\dfrac{21}{4}\)
\(\dfrac{3}{2}\) + \(\dfrac{9}{8}\) x \(2\) = \(\dfrac{12}{8}\) + \(\dfrac{9}{8}\) = \(\dfrac{21}{8}\) x \(2\) = \(\dfrac{21}{4}\)
( \(\dfrac{3}{2}\) + \(\dfrac{9}{8}\) ) x 2
= \(\dfrac{21}{8}\) x 2
= \(\dfrac{21}{4}\)