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3 September, 02:33

Solve the matrix - 2+4y=12

-x+2y = - 12

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Answers (1)
  1. 3 September, 05:48
    0
    -2 + 4y = 12 ⇒ - 2 + 4y = 12

    -x + 2y = - 12 ⇒ - 2x + 4y = - 24

    -2 + 2x = 36

    +2 + 2

    2x = 38

    2 2

    x = 19

    -19 + 2y = - 12

    +19 + 19

    2y = 7

    2 2

    y = 3.5

    -19 + 2 (3.5) = - 12

    -19 + 7 = 12

    -12 = - 12

    (x, y) = (19, 3.5)
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