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OpenStudy (anonymous):
Ben has four more than twice as many CDs as Jake. If they have a total of 31 CDs, how many CDs does Jake have? (1) 9 (3) 14 (2) 13 (4) 22
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OpenStudy (anonymous):
I got the answer equation 1) Ben = 4 + 2*Jake equation 2) 31 = Ben + Jake substitute equation 1 into equation 2 31 = (4 + 2*Jake) + Jake 27 = 2*Jake + Jake 27 = (2 + 1)*Jake 27 = 3*Jake 9 = Jake
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