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30 April, 13:19

Solve the system for (x).

-4x + 2y = 2

-3x + y = 4

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Answers (1)
  1. 30 April, 17:08
    0
    -4x + 2y=2 (equa ... 1)

    -3x + y=4 (equa ... 2)

    From equa ... 2

    y=4 + 3x (equal ... 3)

    Substitute y=4 + 3x into equation 1

    - 4x + 2y=2 (equation 1)

    -4x + 2 (4x + 3x) = 2

    -4x + 8x + 6x = 2

    10x=2

    Divide both sides by 10

    x=2/10=1/5

    x=1/5 or 0.2

    Substitute x=0.2 into equation 1

    -4x + 2y=2

    -4 (0.2) + 2y=2

    -4.8 + 2y=2

    Collect like terms

    2y=2 + 4.8

    2y=6.8

    Divide both side by 2

    y=6.8/2

    y=3.4

    Hence, x=1/5 or 0.2, y=3.4
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