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Math Expert V
Joined: 02 Sep 2009
Posts: 55230
If x + y/2 = z, what is the value of z ?  [#permalink]

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Difficulty:   25% (medium)

Question Stats: 85% (00:48) correct 15% (00:39) wrong based on 37 sessions

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If $$x + \frac{y}{2} = z$$, what is the value of z ?

(1) $$x = \frac{(5 - y)}{2}$$

(2) x = 5

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Current Student P
Joined: 02 Jul 2017
Posts: 294
Concentration: Entrepreneurship, Technology
GMAT 1: 730 Q50 V38 Re: If x + y/2 = z, what is the value of z ?  [#permalink]

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Given x+$$\frac{y}{2}$$=z
Find z?

(1) x=$$\frac{5−y}{2}$$

Putting value of x in original equation
=> $$\frac{5−y}{2} +\frac{y}{2} = z$$
=> $$\frac{5-y+y}{2} = z$$
=> $$\frac{5}{2} = z$$ Answer

Sufficient

(2) x = 5
As we don't know y we cannot find value of z here.
Not sufficient

Answer: A Re: If x + y/2 = z, what is the value of z ?   [#permalink] 11 Sep 2017, 00:48
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# If x + y/2 = z, what is the value of z ?

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