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10 June, 12:39

At a pet store, it costs $5 to wash a cat and $7.50 to wash a dog. Last week the store made $60 from washing cats and dogs. If 6 cats were washed, write and solve a linear equation to find how many dogs were washed.

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  1. 10 June, 15:49
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    If you let x equal the number of cats washed and y equal the number of dogs washed then you can make the equation:

    5x+7.5y=60

    You can then put the number of cats washed into the equation:

    5 (6) + 7.5y=60

    30+7.5y=60

    7.5y=30

    y=4

    So 4 dogs were washed
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