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inequality

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Manager
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Joined: 16 Apr 2009
Posts: 231

Kudos [?]: 101 [0], given: 10

Schools: Ross
inequality [#permalink]

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New post 22 Jul 2009, 16:16
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What is the value of x

2x > x+10 > -x

Please explain.
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Keep trying no matter how hard it seems, it will get easier.

Kudos [?]: 101 [0], given: 10

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Joined: 03 Jul 2009
Posts: 106

Kudos [?]: 93 [1], given: 13

Location: Brazil
Re: inequality [#permalink]

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New post 22 Jul 2009, 16:35
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KUDOS
vannu, I wonder whether this question has something like "x could be...."

Because usually when we have inequalities we have a range of values.

This is what I did:

Resolving the first part \(2x>x+10\)
\(2x-x>10\)
\(x>10\)
This is the solution. Any value major than 10

Nor for the second part \(x+10>-x\)
\(2x >-10\)
\(x>-5\)
This is the solution. Any value major than -5.

As we must attend both situations at the same time, we need to intersect the solutions.
This means that the final solution is \(x>10\)

So, there is no a single value of x. Any value major than 10 will attend the equation.

PS.:Am I right? If yes, consider a kudo ;) I am trying to sum kudos to access the tests. ;)

Kudos [?]: 93 [1], given: 13

Manager
Manager
avatar
Joined: 16 Apr 2009
Posts: 231

Kudos [?]: 101 [0], given: 10

Schools: Ross
Re: inequality [#permalink]

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New post 22 Jul 2009, 16:46
Thanks.
+1 for you.
_________________

Keep trying no matter how hard it seems, it will get easier.

Kudos [?]: 101 [0], given: 10

Re: inequality   [#permalink] 22 Jul 2009, 16:46
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