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If I read a book at a rate of 15 pages a day, I will read it three days sooner than if I read it at a rate of 10 pages a day. If I read at a rate of 6 pages daily, I'll read a book.

Correct answer:

x =  15 d

Step-by-step explanation:

15(d3)=n 10 d=n  15 (d3)=n 10 d=n  15dn=45 10dn=0  Row21510 Row1Row2 15dn=45 0.33n=30  n=0.3333333330=90 d=1545+n=1545+90=9  d=9 n=90  x=n/6=90/6=15 d

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