The given expression is,
[tex]\frac{a}{2}-\frac{a}{3}=8[/tex]To solve the above equation for a, first take the common factor a outside and simplify.
[tex]\begin{gathered} a(\frac{1}{2}-\frac{1}{3})=8 \\ a(\frac{3-2}{2\cdot3})=8 \\ a(\frac{1}{6})=8 \end{gathered}[/tex]Cross multiplying,
[tex]\begin{gathered} a=6\cdot8 \\ a=48 \end{gathered}[/tex]Therefore, the value of a is 48.