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If y=3x and z=2y, what is x+y+z in terms of x ?

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If y=3x and z=2y, what is x+y+z in terms of x ? [#permalink]  28 Nov 2015, 06:24
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Expert's post
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Question Stats:

95% (00:24) correct 5% (00:46) wrong based on 80 sessions
If $$y=3x$$ and $$z=2y$$, what is $$x+y+z$$ in terms of $$x$$ ?

A. $$10x$$
B. $$9x$$
C. $$8x$$
D. $$6x$$
E. $$5x$$

Practice Questions
Question: 9
Page: 148
Difficulty: easy
[Reveal] Spoiler: OA

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Re: If y=3x and z = 2y what is x + y + z in terms of x ? [#permalink]  08 Dec 2015, 07:33
Expert's post
Solution

In $$x+y+z$$ simply substitute the values you do have

So, it becomes: $$x+3x+6x=10x$$

Answer is $$A$$
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Re: If y=3x and z=2y, what is x+y+z in terms of x ? [#permalink]  26 Apr 2020, 11:33
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y=3x
z=2y
then,
=x+y+z
=x+3x+2y where y = 3x so,
=x+3x+2(3x)
=10x
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Re: If y=3x and z=2y, what is x+y+z in terms of x ?   [#permalink] 26 Apr 2020, 11:33
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