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Founder  Joined: 18 Apr 2015
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If |y| ≤ –4x and |3x – 4| = 2x + 6, what is the value of x? [#permalink]
Expert's post 00:00

Question Stats: 58% (01:51) correct 41% (01:26) wrong based on 17 sessions
If $$|y| ≤ - 4x$$ and |$$3x - 4| = 2x + 6$$, what is the value of x?

A. $$-3$$

B. $$\frac{-1}{3}$$

C. $$\frac{-2}{5}$$

D. $$\frac{1}{3}$$

E. $$10$$
[Reveal] Spoiler: OA

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Manager  Joined: 06 Jun 2018
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Re: If |y| ≤ –4x and |3x – 4| = 2x + 6, what is the value of x? [#permalink]
Carcass wrote:
If $$|y| ≤ - 4x$$ and |$$3x - 4| = 2x + 6$$, what is the value of x?

A. $$-3$$

B. $$\frac{-1}{3}$$

C. $$\frac{-2}{5}$$

D. $$\frac{1}{3}$$

E. $$10$$

First of all , thanks for this question that made me upset for a while. It's not that much easy. It must be at least mid level question.

Note:

|y| means the ultimate value is positive.

Given $$|y| \leq-4x$$

So, -4x is positive. It clearly indicates that x is negative.

we have |3x-4| = 2x + 6

Case 1:

3x - 4 is positive .

3x - 4 = 2x + 6

x = 10

Case 2 :

(3x - 4) is negative.

-3x + 4 = 2x + 6

x = - $$\frac{2}{5}$$

Thus x = - 2/5 as it meets out condition. Re: If |y| ≤ –4x and |3x – 4| = 2x + 6, what is the value of x?   [#permalink] 09 Aug 2018, 13:36
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