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stunnakid9094
13.04.2021 •
Mathematics
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?
Solved
Show answers
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Ответ:
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.
Ответ:
for the friend the equation would be 3x+3y=$21
Ответ:
Side Side Side
Step-by-step explanation: