Zahra spends $20.50 on 10 party favors for her party. The boys each receive a puzzle book that cost $1.75 each. The girls each received a magic trick that costs$2.25 each. How many boys and how many girls attended the party?
10 party favors
y=number of girls 2.25 y = total cost of girls party favors
x= number of boys is also equal to (10-y) 1.75 (10-y) = total cost of boys' party favors
Total cost of Boys' and Girls' party favors = 20.50
2.25y + 1.75(10-y) = 20.50
2.25y + 17.50 -1.75y = 20.50
.5y +17.50 = 20.50
.5y = 3.00
y = 6 = girls boys = 10 - y = 10-6 = 4 boys