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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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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

User Tfl
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2 Answers

3 votes
The answer is C.
If you multiply the second equation by 2/5 the variable x will cancel.
User Simon Brahan
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3 votes
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.
User Lister
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