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# If x + y/2 = z, what is the value of z ?

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Math Expert
Joined: 02 Sep 2009
Posts: 59561
If x + y/2 = z, what is the value of z ?  [#permalink]

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11 Sep 2017, 00:35
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Difficulty:

25% (medium)

Question Stats:

85% (00:53) correct 15% (00:51) wrong based on 44 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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Joined: 02 Jul 2017
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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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11 Sep 2017, 00:48
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

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