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If x^2-y^2=12 and x-y=4, then x=
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13 Oct 2022, 10:29
13 Oct 2022, 10:29
Expert Reply
00:00
Question Stats:
58% (01:21) correct
41% (00:56) wrong based on 17 sessions
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If \(x^2-y^2=12\) and \(x-y=4\), then \(x=\)
A. 1.5
B. 2.5
C. 3.5
D. 4.5
E. 5.5
A. 1.5
B. 2.5
C. 3.5
D. 4.5
E. 5.5
Part of the project: GRE QCQ & PS 3 Questions Every One DAILY Challenge - (2022) - Gain 20 Kudos & Get FREE Access to GRE Prep Club TESTS
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GRE Math Essentials (2022)
GRE Geometry Formulas
GRE - Math Book
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GRE Math Essentials (2022)
GRE Geometry Formulas
GRE - Math Book
Re: If x^2-y^2=12 and x-y=4, then x=
[#permalink]
02 Nov 2022, 11:49
02 Nov 2022, 11:49
Expert Reply
(x-y)(x+y)=12
x-y=4
4(x+y)=12
x+y=3
And
x-y=4
Two equations
x+y=3
x-y=4
2x=7
x=3.5
C is the answer
x-y=4
4(x+y)=12
x+y=3
And
x-y=4
Two equations
x+y=3
x-y=4
2x=7
x=3.5
C is the answer
gmatclubot
Re: If x^2-y^2=12 and x-y=4, then x= [#permalink]
02 Nov 2022, 11:49
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