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11 July, 08:00

Christies average monthly expenses are $450 less than half of her monthly income. If the sum of her average monthly expenses and monthly income is $3600 what is her monthly income

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  1. 11 July, 08:20
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    Expenses=x

    income=y

    x=1/2y-450

    x + y=3600 so x=3600-y

    3600-y=1/2y-450 so 4050=3/2y

    1.5y=4050

    y=4050/1.5 so y=2,700

    since x + y=3600 and y=$2,700 then x=$900.00
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