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A car dealer sold x used cars and y new cars during May. If the number

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A car dealer sold x used cars and y new cars during May. If the number [#permalink]

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New post 24 Nov 2015, 11:06
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Question Stats:

77% (00:36) correct 23% (00:35) wrong based on 158 sessions

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A car dealer sold x used cars and y new cars during May. If the number of used cars sold was 10 greater than the number of new cars sold. Which of the following expresses this relationship ?

(A) x > 10y
(B) x > y + 10
(C) x > y – 10
(D) x = y + 10
(E) x = y – 10
[Reveal] Spoiler: OA

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Re: A car dealer sold x used cars and y new cars during May. If the number [#permalink]

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New post 24 Nov 2015, 11:13
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Bunuel wrote:
A car dealer sold x used cars and y new cars during May. If the number of used cars sold was 10 greater than the number of new cars sold. Which of the following expresses this relationship ?

(A) x > 10y
(B) x > y + 10
(C) x > y – 10
(D) x = y + 10
(E) x = y – 10


The most common INCORRECT answer is E.

Here's one way to avoid this:
Given: x used cars and y new cars
Number of used cars (x) sold was 10 greater than the number of new cars (y) sold
So, x is 10 greater than y
To show their relative sizes let's write x LARGER than y to get: x and y

Our goal is to create an EQUATION. So, how do we make these two values EQUAL?
Well, we need to make the smaller value (y) bigger. 10 bigger to be exact.

So, we get x = y + 10
Answer: D

Cheers,
Brent
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Re: A car dealer sold x used cars and y new cars during May. If the number [#permalink]

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New post 24 Nov 2015, 11:16
Let number of used cars sold in May = x
number of new cars sold in May = y
x= y + 10

Answer D
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Re: A car dealer sold x used cars and y new cars during May. If the number [#permalink]

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New post 21 Oct 2016, 00:32
That's why I always opt for a second hand cars, I can save more dollars. You can find great quality used cars at CanadianBlackBook

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Re: A car dealer sold x used cars and y new cars during May. If the number [#permalink]

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New post 26 May 2017, 06:04
used cars = x
new cars = y

Sold Cars= x+y
x= y + 10

Answer D

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Re: A car dealer sold x used cars and y new cars during May. If the number [#permalink]

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New post 12 Oct 2017, 04:16
That's why I always opt for a second hand cars, I can save more dollars. You can find great quality used cars at other auction houses

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Re: A car dealer sold x used cars and y new cars during May. If the number [#permalink]

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New post 16 Oct 2017, 16:46
Bunuel wrote:
A car dealer sold x used cars and y new cars during May. If the number of used cars sold was 10 greater than the number of new cars sold. Which of the following expresses this relationship ?

(A) x > 10y
(B) x > y + 10
(C) x > y – 10
(D) x = y + 10
(E) x = y – 10


Since the number of used cars sold was 10 greater than the number of new cars sold, we need to add 10 to the number of new cars sold to equal the number of used cars sold.

We can create the expression:

x = 10 + y

Answer: D
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Re: A car dealer sold x used cars and y new cars during May. If the number   [#permalink] 16 Oct 2017, 16:46
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