Concept explainers
To find:thenumber of pairs of jeans and the number of the shirts were sold each day.
Answer to Problem 5P
The number of pairs of the jeans were sold is 9 and the number of the shirts were sold is 12 per each day.
Explanation of Solution
Given information:
On Friday, the cost of the jeans is $25 per pair and the cost of each shirt is $18, also the total cost of both sold is $441.
On Saturday, the cost of the jeans is $20 per pair and the cost of each shirt is $20, also the total cost of both sold is $420.
Calculation:
Let x be the number of the jeans sold per each day and y be the number of the shirts sold per each day.
On Friday, the cost of the jeans is $25 per pair and the cost of each shirt is $18, also the total cost of both sold is $441.
It can be converted to linear equation
On Saturday, the cost of the jeans is $20 per pair and the cost of each shirt is $20, also the total cost of both sold is $420.
It can be converted to linear equation
Compute the solutions of the system
Multiply the
Subtract the equation
Divide on both sides by12,
Substitute
Divide on both sides by 20,
Therefore, the number of pairs of the jeans were sold is 9 and the number of the shirts were sold is 12 per each day.
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Algebra and Trigonometry: Structure and Method, Book 2
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