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06 Mar 2017, 05:08
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Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
15%
(low)
Question Stats:
79% (00:54) correct
21%
(01:33)
wrong
based on 101
sessions
History
Date
Time
Result
Not Attempted Yet
06 Mar 2017, 07:19
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To get the value of this expression, we need:
1# exact value of x and y
2# two equations in x and y
3# value for the expression 2x-y
Statement analysis
St 1: 3x +y = x +2y or x = y. two variable one equation. INSUFFICIENT
St 2: we get y = 2x. two variable one equation. INSUFFICIENT
St 1 & St 2: two equation two variable. solving we get, x =0 and y = 0. hence the value of the expression is 0. ANSWER
Option C
1# exact value of x and y
2# two equations in x and y
3# value for the expression 2x-y
Statement analysis
St 1: 3x +y = x +2y or x = y. two variable one equation. INSUFFICIENT
St 2: we get y = 2x. two variable one equation. INSUFFICIENT
St 1 & St 2: two equation two variable. solving we get, x =0 and y = 0. hence the value of the expression is 0. ANSWER
Option C
12 Sep 2017, 06:05
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Can someone explain...
if we solve (x + y) + 3(x – y) = 0 we get 4x=2y , x=1/2y, thus solving for 2x – y should gives us 0 so answer should be B as (1) 3x + y = x + 2y is same as 2x – y...
if we solve (x + y) + 3(x – y) = 0 we get 4x=2y , x=1/2y, thus solving for 2x – y should gives us 0 so answer should be B as (1) 3x + y = x + 2y is same as 2x – y...
