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# Does 7x = 14 + 2x?

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Manager
Joined: 03 Aug 2010
Posts: 101
GMAT Date: 08-08-2011
Does 7x = 14 + 2x? [#permalink]

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25 Mar 2011, 05:29
2
2
00:00

Difficulty:

75% (hard)

Question Stats:

50% (00:54) correct 50% (01:18) wrong based on 92 sessions

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Does 7x = 14 + 2x?

(1) -3x is greater than or equal to -9.
(2) 2x is greater than or equal to 6.

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Math Forum Moderator
Joined: 20 Dec 2010
Posts: 1900
Re: Does 7x = 14 + 2x? [#permalink]

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25 Mar 2011, 05:39
1
Yalephd wrote:
Please provide an eplanation for this question. I'm confused.

$$7x=14+2x$$

$$5x=14$$

$$x=2.8$$

Q: Is x=2.8?

1.
$$-3x\ge-9$$
$$-x\ge-3$$
$$x\le3$$

Means;
x is either 3 or less than 3.
x can be 3,2.9,2.8,0,-90
x may or may not be equal to 2.8
Not Sufficient.

2.
$$2x\ge6$$
$$x\ge3$$

Means;
x can never be equal to 2.8 because it is either equal to 3 or more than 3.
Sufficient.

Ans: "B"

P.S.: By the way, if I consider both statements and both statements must provide true information. x=3
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Manager
Joined: 03 Aug 2010
Posts: 101
GMAT Date: 08-08-2011
Re: Does 7x = 14 + 2x? [#permalink]

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25 Mar 2011, 05:47
Is x=2.8?
Rewording the question like that makes it a very easy question.
Thanks a lot. +1

fluke wrote:
Yalephd wrote:
Please provide an eplanation for this question. I'm confused.

$$7x=14+2x$$

$$5x=14$$

$$x=2.8$$

Q: Is x=2.8?

1.
$$-3x\ge-9$$
$$-x\ge-3$$
$$x\le3$$

Means;
x is either 3 or less than 3.
x can be 3,2.9,2.8,0,-90
x may or may not be equal to 2.8
Not Sufficient.

2.
$$2x\ge6$$
$$x\ge3$$

Means;
x can never be equal to 2.8 because it is either equal to 3 or more than 3.
Sufficient.

Ans: "B"

P.S.: By the way, if I consider both statements and both statements must provide true information. x=3
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Re: Does 7x = 14 + 2x? [#permalink]

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19 Oct 2017, 05:46
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

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Re: Does 7x = 14 + 2x?   [#permalink] 19 Oct 2017, 05:46
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