SOLUTION: Dante spent $11.25 on 3 new and 4 old comic books, and Samantha spent $15.75 0n 10 old and 3 new ones. If comics of one type are sold at the same price, what is the price in dolla
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Question 1018757: Dante spent $11.25 on 3 new and 4 old comic books, and Samantha spent $15.75 0n 10 old and 3 new ones. If comics of one type are sold at the same price, what is the price in dollars of a new comic book?
Answer by Cromlix(4381) (Show Source): You can put this solution on YOUR website!
Hi there,
Make new comics = x
Old comics = y
3x + 4y = 1125.......(1)
3x + 10y = 1575......(2)
Subtract (1) from (2)
.....6y = 450
.....y = 450/6
.....y = 75
Substitute y = 75
into (1)
3x + 4y = 1125.......(1)
3x + 4(75) = 1125
3x = 1125 - 300
3x = 825
x = 825/3
x = 275
New comic book = $2.75
Old comic books = $0.75
Hope this helps :-)
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