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Mathematics 22 Online
OpenStudy (anonymous):

-5/7+(-1/21) is the answer -16/21

jimthompson5910 (jim_thompson5910):

you are correct

jimthompson5910 (jim_thompson5910):

-5/7+(-1/21) -15/21+(-1/21) -15/21-1/21 (-15-1)/21 -16/21

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