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March 25, 2017

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Joel has twice as many cds as Mary has. Subtracting 7 from the number of cds Joel has and dividing by 3 equals the number of cds Blake has. If Blake has 25 cds, how many cds does Mary have?

  • multi step equations - ,

    j = 2m
    (j-7)/3 = b
    b = 25

    start substituting:

    (j-7)/3 = 25
    j-7 = 75
    j = 82
    so,
    m = 41

  • math - ,

    the number of CDs mariella has is 41

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