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If 9 is a factor of 2x, then which of the following may not

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arichards728
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If 9 is a factor of 2x, then which of the following may not [#permalink] New post   20 Feb 2006, 11:58
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If 9 is a factor of 2x, then which of the following may not be an integer?

A) 6x/54 + 2x/3

B) (4x-18)/9

C) (2x+27)/9

D) (81-4x^2)/81

E) (2x-3)/3



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Re: If 9 is a factor of 2x, then which of the following may not [#permalink] New post   20 Feb 2006, 13:20
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A too.
2x is divisible by 9 means that 6x is divisible by 27 and not by 54.
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Re: If 9 is a factor of 2x, then which of the following may not [#permalink] New post   20 Feb 2006, 13:21
A) 6x/54 + 2x/3 = x/9 +2x/3 . x cannot be divided by 9 so it is not an integer. rest all r integers.
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Re: If 9 is a factor of 2x, then which of the following may not [#permalink] New post   20 Feb 2006, 13:43
A) 6x/54 + 2x/3 = x/9 + 2x/3

B) (4x-18)/9 = 4x/9 - 18/9 if 2x is a multiple then 4x is it too etc.

C) (2x+27)/9

D) (81-4x^2)/81

E) (2x-3)/3

9 is a factor of 2x it is not stated that is also the factor of x. I go for A
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Re: If 9 is a factor of 2x, then which of the following may not [#permalink] New post   20 Feb 2006, 15:21
OA is A.. if you make x=4.5, you will see that 6x/54 = 1/2.

Good job guys..
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Re: If 9 is a factor of 2x, then which of the following may not [#permalink] New post   29 Jan 2016, 22:16
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Re: If 9 is a factor of 2x, then which of the following may not [#permalink]
29 Jan 2016, 22:16
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