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20 March, 03:18

Find the solution set of x + y = 5, 2 x - y = 7

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  1. 20 March, 05:58
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    X + y = 5

    x = 5 - y

    2x - y = 7

    2 (5-y) - y = 7

    10 - 2y - y = 7

    10 - 3y = 7

    10 - 7 = 3y

    3 = 3y

    y = 1

    x + y = 5

    x + 1 = 5

    x = 5 - 1

    x = 4
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