Answer:
Mr. Kelly bought [tex]x=3.5[/tex] pounds of chocolates
Step-by-step explanation:
1. Lets name x the number of pounds of chocolates Mr. Kelly bought and write the equation to express the total cost of the trail mix:
(1.5pounds of peanuts)*$4.50 + (x pounds of chocolates)*$4.50 = $22.50
2. To find the number of pounds of chocolates Mr. Kelly bought you need to solve the equation for x:
[tex](1.5*4.50)+4.50x=22.50[/tex]
[tex]6.75+4.50x=22.50[/tex]
[tex]4.50x=22.50-6.75[/tex]
[tex]4.50x=15.75[/tex]
[tex]x=\frac{15.75}{4.50}[/tex]
[tex]x=3.5[/tex] pounds of chocolates