Mathematics, 13.12.2021 19:20, simplekaryme0

Derek has $20 to spend on used books. Hardcover books cost $5 each and paperbacks cost $2 each. Complete the equation which determines the number x of hardcover books and the number y of paperback books he can buy.

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Derek has $20 to spend on used books. Hardcover books cost $5 each and paperbacks cost $2 each. Comp...