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26 April, 03:23

What is the solution to 3x-y=4 and 2y+x=11

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  1. 26 April, 03:41
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    3x - 1y = 4 ⇒ 9x - 3y = 12

    1x + 3y = 11 ⇒ 1x + 3y = 11

    10x = 23

    10 10

    x = 2.3

    3x - y = 4

    3 (2.3) - y = 4

    6.9 - y = 4

    - 6.9 - 6.9

    -y = - 2.9

    -1 - 1

    y = 2.9

    (x, y) = (2.3, 6.9)
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