GMAT Quantitative Reasoning Practice Test 5

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Question : 19 of 100

Marks: +1, -0

If

x=y+3+4.5 x

and

y=x+18

, what is the value of

x \/ y

?

$1 / 4$
$5/ 6$
$-6 {/} 5$
$-7 {/ }20$
$1.5$

Solution:

Solve two equations with two variables. Put

y

in the first equation. We'll get

x=(x+18)+3+4.5 x

, the value of

x

is

-14 / 3

and

y=40 / 3 . x / y=-7 / 20

.

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