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2 June, 23:23

What is the x coordinate of the solution of the system? 2x+y=15 and x-y=3

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  1. 3 June, 02:04
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    x - y = 3

    x = 3 + y

    x - 3 = y

    y = x-3

    put it in 1st equation

    2x + y = 15

    2x + x - 3 = 15

    3x - 3 = 15

    3x = 15+3 = 18

    x = 18/3 = 6

    x = 6
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