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# Which one of the following is the solution of the system of equations

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Manager
Joined: 26 Dec 2018
Posts: 144
Location: India
Which one of the following is the solution of the system of equations  [#permalink]

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Updated on: 24 Jan 2019, 05:57
00:00

Difficulty:

5% (low)

Question Stats:

95% (00:30) correct 5% (00:25) wrong based on 34 sessions

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Which one of the following is the solution of the system of equations given?

x + 2y = 7
x + y = 4

(A) x = 3, y = 2
(B) x = 2, y = 3
(C) x = 1, y = 3
(D) x = 3, y = 1
(E) x = 7, y = 1

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Originally posted by UB001 on 05 Jan 2019, 10:37.
Last edited by UB001 on 24 Jan 2019, 05:57, edited 1 time in total.
Manager
Joined: 01 May 2017
Posts: 82
Location: India
Re: Which one of the following is the solution of the system of equations  [#permalink]

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05 Jan 2019, 18:48
1
Which one of the following is the solution of the system of equations given?

$$x + 2*y = 7$$ -------------- equation 1
$$x + y = 4$$ -------------- equation 2

equation 1 - equation 2 implies y = 3
Substituting y=3 in equation 2 implies x =1
(x,y) = (1,3)
Option C is correct
VP
Joined: 31 Oct 2013
Posts: 1469
Concentration: Accounting, Finance
GPA: 3.68
WE: Analyst (Accounting)
Re: Which one of the following is the solution of the system of equations  [#permalink]

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06 Jan 2019, 04:54
UB001 wrote:
Which one of the following is the solution of the system of equations given?

x + 2y = 7
x + y = 4

(A) x = 3, y = 2
(B) x = 2, y = 3
(C) x = 1, y = 3
(D) x = 3, y = 1
(E) x = 7, y = 1

x + 2y = 7
x + y = 3
..........................................
y = 3.

x = 1.

Deducting 1st equation from the 2nd.
Re: Which one of the following is the solution of the system of equations   [#permalink] 06 Jan 2019, 04:54
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