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17 November, 19:52

Two numbers have a sum of - 9. One number is x. What expression represents the other number?

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  1. 17 November, 20:13
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    Assume that the other number is y.

    we know that the addition of both number is - 9

    this means that:

    x+y=-9

    reorder this equation to seperate the y variable:

    y=-9-x
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