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avohden
Joined: 09 Jul 2013
Last visit: 14 Mar 2015
Posts: 403
Given Kudos: 630
Status:1,750 Q's attempted and counting
Affiliations: University of Florida
Location: United States (FL)
Schools: Warrington (A)
GMAT 1: 570 Q42 V28
GMAT 2: 610 Q44 V30
GMAT 3: 600 Q45 V29
GMAT 4: 590 Q35 V35
GPA: 3.45
WE:Accounting (Accounting)
24 Oct 2013, 17:35
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C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
45%
(medium)
Question Stats:
60% (01:25) correct
40%
(01:39)
wrong
based on 168
sessions
History
Date
Time
Result
Not Attempted Yet
25 Oct 2013, 00:33
Kudos
Bookmarks
Is ax = 6 - bx ?
(1) a = b. The question becomes: is ax = 6 - ax? --> is ax = 3? We don't know that. Not sufficient.
(2) 2ax = 6 --> ax=3. The question becomes: is 3 = 6 - bx? --> is bx = 3. We don't know that. Not sufficient.
(1)+(2) From (1) the question became "is ax = 3?" and (2) answers that question. Sufficient.
Answer: C.
(1) a = b. The question becomes: is ax = 6 - ax? --> is ax = 3? We don't know that. Not sufficient.
(2) 2ax = 6 --> ax=3. The question becomes: is 3 = 6 - bx? --> is bx = 3. We don't know that. Not sufficient.
(1)+(2) From (1) the question became "is ax = 3?" and (2) answers that question. Sufficient.
Answer: C.
avohden
Joined: 09 Jul 2013
Last visit: 14 Mar 2015
Posts: 403
Own Kudos:
Given Kudos: 630
Status:1,750 Q's attempted and counting
Affiliations: University of Florida
Location: United States (FL)
Schools: Warrington (A)
GMAT 1: 570 Q42 V28
GMAT 2: 610 Q44 V30
GMAT 3: 600 Q45 V29
GMAT 4: 590 Q35 V35
GPA: 3.45
WE:Accounting (Accounting)
29 Oct 2013, 22:16
Kudos
Bookmarks
Official Explanation
Answer: C First, simplify the question:
Is ax + bx = 6 ?
Is x(a + b) = 6 ?
Either of those versions could turn out to be helpful.
Statement (1) is insufficient. We can simplify the question further:
Is ax + ax = 6 ?
Is 2ax = 6 ?
Is ax = 3 ?
Statement (2) is also insufficient. With this statement alone, we don't know anything about b, so the value of ax isn't enough.
Taken together, the statements are sufficient. Statement (1) tells us that the question is identical to:
Is 2ax = 6 ? and (2) tells us that this is true: 2ax = 6. Choice (C) is correct.
Answer: C First, simplify the question:
Is ax + bx = 6 ?
Is x(a + b) = 6 ?
Either of those versions could turn out to be helpful.
Statement (1) is insufficient. We can simplify the question further:
Is ax + ax = 6 ?
Is 2ax = 6 ?
Is ax = 3 ?
Statement (2) is also insufficient. With this statement alone, we don't know anything about b, so the value of ax isn't enough.
Taken together, the statements are sufficient. Statement (1) tells us that the question is identical to:
Is 2ax = 6 ? and (2) tells us that this is true: 2ax = 6. Choice (C) is correct.
