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18.03.2021 •
Mathematics
An administrative assistant is making some copies. She made 19 one-sided copies and 26
two-sided copies for the V.P. of Marketing, which took a total of 168 seconds. Next, she made
23 one-sided copies and 26 two-sided copies for the Director of Sales, which took 176
seconds. How long does it take to make each type of copy?
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