GMAT Quantitative Reasoning Practice Test 1

Question : 22 of 100

Marks: +1, -0

4 X Z+Y W=3

and

X W+Y Z=6

, what is the value of the expression

(2 X+Y)(2 Z+W)

Solution:

(2 X+Y)(2 Z+W)=4 X Z+2 X W+2 Z Y+W Y

Now, plug in this data to get:

3+2(6)=15

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