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27 December, 20:54

What is the solution to this system of linear equations:

y-x=4 and y+2x=1

+3
Answers (1)
  1. 28 December, 00:02
    0
    -x + y = 4

    2x + y = 1

    -3x = 3

    -3 - 3

    x = - 1

    -x + y = 4

    - (-1) + y = 4

    1 + y = 4

    - 1 - 1

    y = 3

    (x, y) = (-1, 3)
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