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8 October, 15:20

3x + 2y = A 5x + y = B Eliminating the variable y from the system of equations results in - 7x =

A) A - 2B

B) 2B - A

C) A + 2B

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Answers (1)
  1. 8 October, 16:20
    0
    The answer is A

    You would multiply the second equation by - 2 to clear the 'y'.

    This leaves - 10x = 2B and 3x = A

    When combining these we get - 7x = A - 2B
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