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If x + 2y = 5 and x - 4y = -7, what is the value of x?

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If x + 2y = 5 and x - 4y = -7, what is the value of x? [#permalink] New post 19 May 2018, 16:12
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If \(x + 2y = 5\)and \(x - 4y = -7\), what is the value of x?

[Reveal] Spoiler: OA
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Re: If x + 2y = 5 and x - 4y = -7, what is the value of x? [#permalink] New post 27 May 2018, 05:55
Substracting one equation from the other will give an equation with only value of y.
On solving we get it as 2.
On substituting the value of y in any one of the equations,we get the value of x as 1
Re: If x + 2y = 5 and x - 4y = -7, what is the value of x?   [#permalink] 27 May 2018, 05:55
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If x + 2y = 5 and x - 4y = -7, what is the value of x?

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