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If 3x – t = t + 5x, what is the value of x ?
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02 Oct 2018, 04:23
02 Oct 2018, 04:23
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Difficulty:
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Question Stats:
98% (00:37) correct
2%
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wrong
based on 191
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Re: If 3x – t = t + 5x, what is the value of x ?
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02 Oct 2018, 14:03
02 Oct 2018, 14:03
taniad wrote:
If 3x – t = t + 5x, what is the value of x ?
(1) t = 4
(2) x < 0
(1) t = 4
(2) x < 0
Statement 1: t = 4. we can plug this value into the equation and can find out the value of x. Sufficient.
Statement : x<0. we just know that x is negative. No information regarding t. NOT sufficient.
The best answer is A.
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Re: If 3x – t = t + 5x, what is the value of x ?
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27 Jul 2019, 07:19
27 Jul 2019, 07:19
Expert Reply
Top Contributor
taniad wrote:
If 3x – t = t + 5x, what is the value of x ?
(1) t = 4
(2) x < 0
(1) t = 4
(2) x < 0
Given: 3x – t = t + 5x
Target question: What is the value of x ?
Statement 1: t = 4
Take: 3x – t = t + 5x
Replace t with 4 to get: 3x – 4 = 4 + 5x
When we solve this equation, we get x = -4
Since we can answer the target question with certainty, statement 1 is SUFFICIENT
Statement 2: x < 0
If x < 0, then x can have infinitely-many different values
Since we cannot answer the target question with certainty, statement 2 is NOT SUFFICIENT
Answer: A
Cheers,
Brent
