SOLUTION: A Bookstore had 70 copies of a magazine. Yesterday, it sold 2/5 of them. Today, it sold 5/7 of what remained. How many copies does the bookstore have left?

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Question 1198740: A Bookstore had 70 copies of a magazine. Yesterday, it sold 2/5 of them. Today, it sold 5/7 of what remained. How many copies does the bookstore have left?
Answer by ikleyn(52833) About Me  (Show Source):
You can put this solution on YOUR website!
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A Bookstore had 70 copies of a magazine. Yesterday, it sold 2/5 of them.
Today, it sold 5/7 of what remained. How many copies does the bookstore have left?
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Step 1: determine how many left yesterday

        70 - %282%2F5%29%2A70 = 70 - 28 = 42.


Step 2: determine how many left today

        42 - %285%2F7%29%2A42 = 42 - 30 = 12.


ANSWER.  12 magazines left.

Solved.