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20 April, 11:56

A group of tourists spends $156 to rent snorkels and fins. A total of 15 snorkels and 18 pairs of fins are rented. Renting a snorkel costs four times as much as renting a pair of fins. How much does it cost to rent a snorkel?

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  1. 20 April, 12:36
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    You could use many methods to find the answer to this problem, but I am going to use the most efficient one I know.

    18f+15 (4f) = 156

    F is for fins. We should now solve the equation.

    18f+60f=156

    78f=156

    156:78=2

    So fins cost 2 dollars. Now, we know snorkels cost four times the amount of fins. Four times 2 is eight. So the snorkels cost $8 to rent. Let's check our math.

    15 (8) + 18 (2)

    120+36=156

    So it cost $8 to rent a snorkel.
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