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# If r = 5z then 15z = 3y, then r =

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Math Expert
Joined: 02 Sep 2009
Posts: 64224
If r = 5z then 15z = 3y, then r =  [#permalink]

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08 Aug 2019, 00:40
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Difficulty:

5% (low)

Question Stats:

100% (00:36) correct 0% (00:00) wrong based on 35 sessions

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If r = 5z then 15z = 3y, then r =

A. y
B. 2 y
C. 5 y
D. 10 y
E. 15 y

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Joined: 18 Dec 2017
Posts: 1377
Location: United States (KS)
GMAT 1: 600 Q46 V27
Re: If r = 5z then 15z = 3y, then r =  [#permalink]

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08 Aug 2019, 15:26
Bunuel wrote:
If r = 5z then 15z = 3y, then r =

A. y
B. 2 y
C. 5 y
D. 10 y
E. 15 y

since 5z and 15z have 5 in common, consider multiplying r=5z with 3. You get 3r=15z.
Which means 3r=3y. Leading us to r=y.
Hence A
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Re: If r = 5z then 15z = 3y, then r =   [#permalink] 08 Aug 2019, 15:26