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If y = 4x and z = y/2, the in terms of x, y + z =

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If y = 4x and z = y/2, the in terms of x, y + z =  [#permalink]

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05 Jul 2018, 03:49
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Difficulty:

5% (low)

Question Stats:

96% (00:44) correct 4% (02:21) wrong based on 31 sessions

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If $$y = 4x$$ and $$z = \frac{1}{2} y$$, the in terms of x, $$y + z =$$

A. 4.5x

B. 6x

C. 7x

D. 9x

E. 11x

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If y = 4x and z = y/2, the in terms of x, y + z =  [#permalink]

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05 Jul 2018, 04:50
Bunuel wrote:
If $$y = 4x$$ and $$z = \frac{1}{2} y$$, the in terms of x, $$y + z =$$

A. 4.5x

B. 6x

C. 7x

D. 9x

E. 11x

$$y+z=4x+\frac{1}{2} y$$=$$4x+\frac{1}{2}$$*$$4x=4x+2x=6x$$

Ans. (B)
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Re: If y = 4x and z = y/2, the in terms of x, y + z =  [#permalink]

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05 Jul 2018, 04:53
We can translate the stem:
y=4x
z=0.5y=0.5*4x=2x

y+z=4x+2x=6x

In My Opinion
Ans: B
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Re: If y = 4x and z = y/2, the in terms of x, y + z =  [#permalink]

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05 Jul 2018, 06:53
Bunuel wrote:
If $$y = 4x$$ and $$z = \frac{1}{2} y$$, the in terms of x, $$y + z =$$

A. 4.5x

B. 6x

C. 7x

D. 9x

E. 11x

Let x = 1

So, y = 4 and z = 2

Thus, x + y + z = 7, which is nothing but 7x , the answer must be (C)
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If y = 4x and z = y/2, the in terms of x, y + z =  [#permalink]

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05 Jul 2018, 19:43
Bunuel wrote:
If $$y = 4x$$ and $$z = \frac{1}{2} y$$, the in terms of x, $$y + z =$$

A. 4.5x

B. 6x

C. 7x

D. 9x

E. 11x

Let $$x = 3, y = 12,$$ and $$z = 6$$
$$(y+z)=(12+6)=18=6x$$

Let $$x = 2, y = 8,$$ and $$z = 4$$
$$(y+z)=(8+4)=12=6x$$

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Re: If y = 4x and z = y/2, the in terms of x, y + z =  [#permalink]

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05 Jul 2018, 19:55
Bunuel wrote:
If $$y = 4x$$ and $$z = \frac{1}{2} y$$, the in terms of x, $$y + z =$$

A. 4.5x

B. 6x

C. 7x

D. 9x

E. 11x

Given ,

y = 4x

z =$$\frac{1}{2}$$ * 4x

z = 2x

Question :

y + z = 4x + 2x = 6x .

Thus the best answer is B.
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Re: If y = 4x and z = y/2, the in terms of x, y + z =  [#permalink]

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07 Jul 2018, 17:29
Bunuel wrote:
If $$y = 4x$$ and $$z = \frac{1}{2} y$$, the in terms of x, $$y + z =$$

A. 4.5x

B. 6x

C. 7x

D. 9x

E. 11x

Since y = 4x and z = ½y, then y = 2z. So 2z = 4x and z = 2x.

Thus, y + z = 4x + 2x = 6x.

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Joined: 18 Jun 2018
Posts: 251
Re: If y = 4x and z = y/2, the in terms of x, y + z =  [#permalink]

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08 Jul 2018, 02:43
OA: B

$$y = 4x$$ .....(1)
$$z = \frac{1}{2} y$$.....(2)
putting (1) into (2), we get
$$z = \frac{1}{2}*4x$$
$$z = 2x$$

then $$y+z =4x + 2x = 6x$$
Re: If y = 4x and z = y/2, the in terms of x, y + z = &nbs [#permalink] 08 Jul 2018, 02:43
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