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6 December, 23:28

Find the solution to the system of equations: 2x+y=12 7x-2y=31

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  1. 6 December, 23:45
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    x=5 and y=2

    2x + y + - 2x = 12 + - 2x

    y = - 2x + 12

    7x - 27 = 31 (we are substituting here for the y)

    11x - 24 = 31

    11x - 24 + 24 = 31 + 24

    11x = 55

    x = 5

    y=-2x+12

    y = (-2) (5) + 12

    y=2
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