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1 January, 14:06

Solve x-y=2 and x+y=1

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Answers (2)
  1. 1 January, 14:20
    0
    x - y = 2 / / x + y = 1

    Find x in the first equation and substitute it into the second equation.

    x = 2 + y ⇒ (2 + y) + y = 1

    2 + 2y = 1

    2y = - 1

    Substitute y into the first equation.

    y = - 1/2 ⇒ x - (-1/2) = 2

    x = 1 1/2

    x = 1 1/2, y = - 1/2
  2. 1 January, 14:20
    0
    We can use elimination to solve this system of linear equations:

    x - y = 2

    x + y = 1

    Add the equations together to cancel out the y variables:

    2x = 3

    Divide by 2:

    x = 3/2

    Use x to solve for y:

    3/2 - y = 2

    Add y to both sides:

    3/2 = y + 2

    Subtract 2 rom both sides:

    y = - 1/2

    So, your answer is x = 3/2 and y = - 1/2.
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