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A library is having a used book sale. All hardcover books
have the same price and all softcover books have the
same price. You buy 4 hardcover books and 2 softcover
books for $24. Your friend buys 3 hardcover books and
3 softcover books for $21. What is the cost in dollars of a
hardcover book?

Respuesta :

KittyHi5

Answer:  It should cost $5

Step-by-step explanation:

First you have 4 hardcover and 2 softcover, so 4x+2y= $24 and for your friend it would be 3x+3y= $21.

You have

(3x+3y)2  = 72

(4x+2y)3  = 42

Then subtract them which is 30 you would divide by 6 since 3x2=6

Which gets you to 5.

haleylofton05
You have 4 hardcovers and 2 soft covers... soo the equation would be 4x+2y=$24
for the friend the equation would be 3x+3y=$21

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