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25 May, 05:51

Alex's dog weighs 7 times as much as her cat. Together, the two pets weigh 72 pounds. How much does Alex's dog weigh?

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  1. 25 May, 06:15
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    D=dog's weight

    c=cat's weight

    d=7c

    d+c=72

    sub 7c for d

    7c+c=72

    8c=72

    divide both sides by 8

    c=9

    d=7c

    d=7 (9)

    d=63

    dog=63lb
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