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math

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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?

  • math - ,

    mary's cds --- x
    joel has ------ 2x
    blake ------( 2x-7)/3

    (2x-7)/3 = 25
    2x-7 = 75
    2x=82
    x = 41

    mary has 41
    joel has 82
    blake has 25

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