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DS - What is the value of (2T+T-X) / (T-X)

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DS - What is the value of (2T+T-X) / (T-X)  [#permalink]

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New post Updated on: 21 Jan 2019, 20:27
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I answered this correctly as "A" (statement 1 sufficient), however I solved it as a Combo. OG 2018 and Manhattan Navigator solves it as "Direct Algebra."

OG 2018 - DS - #404

What is the value of (2T+T-X) / (T-X)?

Can this be solved as a combo? I cleaned the statement from (2T+T-X) / (T-X) to "2T" by cancelling out (T-X) on top and bottom of the fraction.

Cleaned up statement: What is "2T"

Statement 1: 2T / (T-X) = 3. I cross multiplied to get my combo 2T = 3T-3X.
statement 1 was sufficient.

Is it mathematically correct to clean up the statement into "2T"?
Can a Combo equal an expression with variables? My combo equaled 2T = 3T -3X


Thank you.

Originally posted by expialadocious on 21 Jan 2019, 20:03.
Last edited by expialadocious on 21 Jan 2019, 20:27, edited 2 times in total.
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Re: DS - What is the value of (2T+T-X) / (T-X)  [#permalink]

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New post 21 Jan 2019, 20:11
(2T+T-X) / (T-X) = 2T/T-X + 1.
Hence 1. is sufficient because when 2T/(T-X) = 3, there is a definite singular value,i.e, 4.
And yes, you can break the eqn into as many parts as you want, as long as you follow the rules of addition and subtraction of fractional values.
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Re: DS - What is the value of (2T+T-X) / (T-X)  [#permalink]

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New post 21 Jan 2019, 20:32
SoumyajitKar wrote:
(2T+T-X) / (T-X) = 2T/T-X + 1.
Hence 1. is sufficient because when 2T/(T-X) = 3, there is a definite singular value,i.e, 4.
And yes, you can break the eqn into as many parts as you want, as long as you follow the rules of addition and subtraction of fractional values.


Thanks! But is it mathematically correct to Clean original statement (2T + T-X) / (T-X) into 2T? Did I break a rule by not splitting denominator into 2 different fractions?

Is the combo derived from 2T / (T-X) = 3 into 2T = 3T - 3X correct? Can a combo equal an expression with variables or must a combo equal 1 value without any variables?

Thank you
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Re: DS - What is the value of (2T+T-X) / (T-X)  [#permalink]

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New post 21 Jan 2019, 20:39
expialadocious wrote:
I answered this correctly as "A" (statement 1 sufficient), however I solved it as a Combo. OG 2018 and Manhattan Navigator solves it as "Direct Algebra."

OG 2018 - DS - #404

What is the value of (2T+T-X) / (T-X)?

Can this be solved as a combo? I cleaned the statement from (2T+T-X) / (T-X) to "2T" by cancelling out (T-X) on top and bottom of the fraction.

Cleaned up statement: What is "2T"

Statement 1: 2T / (T-X) = 3. I cross multiplied to get my combo 2T = 3T-3X.
statement 1 was sufficient.

Is it mathematically correct to clean up the statement into "2T"?
Can a Combo equal an expression with variables? My combo equaled 2T = 3T -3X


Thank you.


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Re: DS - What is the value of (2T+T-X) / (T-X)   [#permalink] 21 Jan 2019, 20:39
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