\[\begin{aligned}\left(4\frac{5}{10}+l\right)-5\frac{2}{10}&=8\\\square \frac{\square}{\square}+l&=\square +\square \frac{\square}{\square}\\\\square \frac{\square}{\square}+l&=\square \frac{\square}{\square}\\\\l&=\square \frac{\square}{\square}-\square \frac{\square}{\square}\\\\l&=\square \frac{\square}{\square}\end{aligned}\]