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5 August, 22:01

The sum of two numbers is 15. The difference of he same two numbers is 3. What are the two numbers?

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  1. 5 August, 23:58
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    x+y = 15

    x-y = 3

    add the two equations

    2x = 18

    divide by 2

    x = 9

    x + y = 15

    9 + y = 15

    subtract 9

    y = 9

    The two numbers are 6 and 9
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