The cost of each spiral notebook is $3 and the cost of each book cover is $2
Given that Alexis and her sister bought school supplies. Alexis bought 5 spiral notebooks and 6 book covers for $27. Her sister bought 4 spiral notebooks and 2 book covers for $16 and asked to find out the cost of each spiral notebook and each book cover.
Let's assume spiral notebooks as "x" Β and book covers as "y".
As a result, two linear equations in two variables will be formed.
β5x+6y=$27; Let's assume this equation as A
β4x+2y=$16; Let's assume this equation as B
Multiply equation B with 3
β12x+6y=$48; Let's assume this equation as C
Equation c- Equation A
β$48-$27=7x
β7x=$21
βx==$3
The cost of the spiral notebook is $3
From equation A
β5($3)+6y=$27
β$15+6y=$27
β6y=$12
βy=$2
The cost of the book cover is $2
Therefore,The cost of each spiral notebook is $3 and the cost of each book cover is $2
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