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14 February, 18:38

What are the values of x and y for this system of equations?

2x + y = - 1

-x + 3y = 18

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Answers (2)
  1. 14 February, 20:44
    0
    X=-3 and y=5

    2x+y=-1

    -x+3y=18

    3y-18=x

    2 (3y-18) + y=-1

    6y-36+y=-1

    7y=-1+36

    7y=35

    y=35/7

    y=5

    -x+3y=18

    -x+3 (5) = 18

    -x+15=18

    -x=18-15

    -x=3

    x=-3
  2. 14 February, 20:52
    0
    X=1+y/2

    That's the answer to the first half of the problem shown the whole problem is invalid together
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