Is │x│=│y│?
(1) x -y = 6
(2) x +y = 0
Here i took statement 2 and put x = -y in the equation │x│=│y│ and thus solved it. Is there any other method to do that??
OA: B
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iwant700plus
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Pick #s.
(2) x+y=0 -->x=-y
x=4, y=-4 |x=|y|
Because x=-y nomatter what x is positive or negative |x|=|y|
(2) x+y=0 -->x=-y
x=4, y=-4 |x=|y|
Because x=-y nomatter what x is positive or negative |x|=|y|
ketkoag wrote:Is │x│=│y│?
(1) x -y = 6
(2) x +y = 0
Here i took statement 2 and put x = -y in the equation │x│=│y│ and thus solved it. Is there any other method to do that??
OA: B
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LulaBrazilia
- Master | Next Rank: 500 Posts
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- Joined: Tue Mar 31, 2009 10:50 am
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If we add the two equations, we get x = 6. If we put that back into equation (1) we get 6-y=0 -> y=0. however if we put it back into equation (2) we get 6+y=0 -> y=-6.
What am I missing?
What am I missing?
