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11 February, 17:19

The some of the numbers is 77. The greater number is 5 more than the smaller number. Which equation can be used to solve for the smaller number?

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  1. 11 February, 19:25
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    Let the smaller number be x and the larger one be y

    x + y = 77

    y = x + 5

    Substituting into the first equation

    x + (x + 5) = 77

    2x + 5 = 77

    Subtracting 5 to both sides

    2x + 5 - 5 = 77-5

    2x = 72

    Divide both sides by 2

    2x/2 = 72/2

    x = 36
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