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30 April, 01:03

Given equations A and B as 2/5x+y=12 and 5/2y-x=6, respectively, which expression will eliminate variable x?

A.) 5/2A+2/5B

B.) 5/2A-B

C.) A+2/5B

D.) 5/2A-2/5B

E.) 25/10A+6/10B

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Answers (2)
  1. 30 April, 02:47
    0
    The answer is C.

    If you multiply the second equation by 2/5 the variable x will cancel.
  2. 30 April, 04:45
    0
    The answer is C.) A+2/5B.

    Adding equation A to 2/5B will result in canceling the x terms, i. e. 2/5x + 2/5 (-x) = 0.
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