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20 October, 17:16

Which system of equations is equivalent to the system of equations shown?

x - 2y = 4

3x + y = 9

A) 4x + y = 13 and 2x + 4y = - 8

B) 4x - y = 13 and 2x + 4y = 8

C) 4x + y = 13 and 2x - 4y = - 8

D) 4x - y = 13 and 2x - 4y = 8

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Answers (2)
  1. 20 October, 20:14
    0
    x+y = 4 (-2)

    3x+2y = 9

    -2x - 2y = - 8

    3x + 2y = 9

    x = 1

    1+y = 9

    y = 9-1

    y = 8
  2. 20 October, 20:53
    0
    X - 2y = 4

    3x + y = 9

    is equivalent to:

    4x - y = 13

    2x - 4y = 8
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