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20 November, 01:40

Lisa spends 1/4 of her earnings on rent and 1/5 of her earnings on food let m stand for her monthly earnings in dollars. Which of the following expressions represents the number of dollars lisa has left at the end of the montj after paying rent and buying food

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  1. 20 November, 03:00
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    Step-by-step explanation:

    Let her total earnings be $m

    Rent = m/4

    Food = m/5

    Let the among left be X

    : m/4 + m/5 + X = m

    Multiply each term by 20

    5m + 4m + 20X = 20m

    Collecting like terms

    20X = 20m - 5m - 4m

    20X = 11m

    X = 11m/20

    Amount left = $11m/20
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