April sold 75 tickets to a school play and collected a total of $$\$ 495 .$$ If the adult tickets
cost $$\$ 8$$ each and child tickets cost $$\$ 5$$ each, how many adult tickets and how many
child tickets did she sell?
Let $$x=$$ No. of child tickets
$$y=$$ No. of adult tickets
$$5 x+8 y=495$$