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1 December, 15:34

4x - 2y = 7

X + 2y = 3

What are x and y?

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Answers (2)
  1. 1 December, 18:05
    0
    {x, y} = {2,1/2}

    Step-by-step explanation:

    Solve by Substitution:

    1. Solve equation [2] for the variable x

    [2] x = - 2y + 3

    2. Plug this in for variable x in equation [1]

    [1] 4• (-2y+3) - 2y = 7

    [1] - 10y = - 5

    3. Solve equation [1] for the variable y

    [1] 10y = 5

    [1] y = 1/2

    By now we know this much:

    x = - 2y+3

    y = 1/2

    4. Use the y value to solve for x

    x = - 2 (1/2) + 3 = 2

    Solution:

    {x, y} = {2,1/2}
  2. 1 December, 18:32
    0
    4x - 2y = 7

    x + 2y = 3

    5x = 10

    x=2 and y=0
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