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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] New post 28 Nov 2015, 06:24
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If \(y=3x\) and \(z=2y\), what is \(x+y+z\) in terms of \(x\) ?

A. \(10x\)
B. \(9x\)
C. \(8x\)
D. \(6x\)
E. \(5x\)


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[Reveal] Spoiler: OA

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