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5x-2y=2y-3x Princeton Review
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25 Jul 2021, 10:02
25 Jul 2021, 10:02
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Hello,
I'm working through PrincetonReview book Question 1 of Real-World Math Drill and I don't understand their answer to the question below:
5x-2y=2y-3x
Answer. D
"Variables in the question stem means to plug in. For this problem, it’s easier to plug in if you simplify the equation first. Rearrange the equation to put the variables on opposite sides of the equal sign. 8x = 4y. Then divide both sides by 4 to get that 2x = y. Now, choose some easy numbers such as x = 2 and y = 4. In this case, Quantity B is greater, so eliminate answers (A) and ©. Next, try something like x = 0 and y = 0. In this case, the two quantities are equal. Eliminate choice (B) and the correct answer is (D).”
They state the relationship cannot be determined from the information given.
However when simplified one gets a ratio:
Y/x =2/1
Thus isn't this ratio stating that the quantity of y is 2 times the quantity of x?
Therefore Y (ANSWER CHOICE B) should be the correct answer?
I'm working through PrincetonReview book Question 1 of Real-World Math Drill and I don't understand their answer to the question below:
5x-2y=2y-3x
Answer. D
"Variables in the question stem means to plug in. For this problem, it’s easier to plug in if you simplify the equation first. Rearrange the equation to put the variables on opposite sides of the equal sign. 8x = 4y. Then divide both sides by 4 to get that 2x = y. Now, choose some easy numbers such as x = 2 and y = 4. In this case, Quantity B is greater, so eliminate answers (A) and ©. Next, try something like x = 0 and y = 0. In this case, the two quantities are equal. Eliminate choice (B) and the correct answer is (D).”
They state the relationship cannot be determined from the information given.
However when simplified one gets a ratio:
Y/x =2/1
Thus isn't this ratio stating that the quantity of y is 2 times the quantity of x?
Therefore Y (ANSWER CHOICE B) should be the correct answer?
Re: 5x-2y=2y-3x Princeton Review
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25 Jul 2021, 10:23
25 Jul 2021, 10:23
Expert Reply
Hi
Please, we are here to help you. However, this is not the way to post a question on the board
Follow the rules for posting https://gre.myprepclub.com/forum/how-to-po ... 12752.html
And how to format properly a QCQ question https://gre.myprepclub.com/forum/how-to-po ... 12752.html
This is how looks like a QCQ question https://gre.myprepclub.com/forum/3-x-10084.html
Ask if you do need further assistance
Regards
Please, we are here to help you. However, this is not the way to post a question on the board
Follow the rules for posting https://gre.myprepclub.com/forum/how-to-po ... 12752.html
And how to format properly a QCQ question https://gre.myprepclub.com/forum/how-to-po ... 12752.html
This is how looks like a QCQ question https://gre.myprepclub.com/forum/3-x-10084.html
Ask if you do need further assistance
Regards
Re: 5x-2y=2y-3x Princeton Review
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26 Jul 2021, 07:02
26 Jul 2021, 07:02
1
The equation simplifies to 2x = y. If x = 0, and y = 0, the equation is satisfied and y = x. However, if x=1 and y = 2, the equation is also true, but in this case, y > x. Therefore, no conclusion can be made. TashaScarlett
Hope this helps.
Hope this helps.
