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17 September, 16:03

Solve the following system of equations

-2x+y=1

-4x+y=-1

+4
Answers (2)
  1. 17 September, 16:38
    0
    (1, 3).

    Step-by-step explanation:

    -2x + y = 1

    -4x + y = - 1 Subtract:

    -2x - (-4x) = 1 - (-1)

    -2x + 4x = 2

    2x = 2

    x = 1.

    Substitute x = 1 in the first equation:

    -2 (1) + y = 1

    -2 + y = 1

    y = 1 + 2

    y = 3.
  2. 17 September, 16:50
    0
    x = 1

    y =

    Step-by-step explanation:

    -2x + y=1

    -4x + y=-1

    -2 (2) x + (2) y = (2) 1 (multilply by 2)

    -4x + y = - 1

    -4x + 2y = 2

    -4x + y = - 1

    minus side by

    y = 3

    x =
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