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If 4(–3x – 8) = 8(–x + 9), what is the value of x2?

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If 4(–3x – 8) = 8(–x + 9), what is the value of x2? [#permalink] New post 23 Jun 2018, 11:38
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Question Stats:

86% (00:58) correct 13% (00:57) wrong based on 23 sessions
If \(4(-3x - 8) = 8(-x + 9)\), what is the value of \(x^2\)?


[Reveal] Spoiler: OA
676

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Re: If 4(–3x – 8) = 8(–x + 9), what is the value of x2? [#permalink] New post 01 Jul 2018, 21:54
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sandy wrote:
If \(4(-3x - 8) = 8(-x + 9)\), what is the value of \(x^2\)?


[Reveal] Spoiler: OA
676



Here;

\(4(-3x - 8) = 8(-x + 9)\)

or \((-3x - 8) = 2(-x + 9)\)

or \(-3x -8 = -2x + 18\)

or \(x = -26\)

or \(x^2 = (-26)^2\) = 676
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Retired Moderator
User avatar
Joined: 07 Jun 2014
Posts: 4803
GRE 1: Q167 V156
WE: Business Development (Energy and Utilities)
Followers: 171

Kudos [?]: 2911 [0], given: 394

Re: If 4(–3x – 8) = 8(–x + 9), what is the value of x2? [#permalink] New post 15 Jul 2018, 03:44
Expert's post
Explanation

Distribute, group like terms, and solve for x:

4(–3x – 8) = 8(–x + 9)

–12x – 32 = –8x + 72

–32 = 4x + 72

–104 = 4x

–26 = x

Then, multiply 26 by 26 in the calculator (or –26 by –26, although the negatives will cancel each other out) to get \(x^2\), which is 676.
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Sandy
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Re: If 4(–3x – 8) = 8(–x + 9), what is the value of x2?   [#permalink] 15 Jul 2018, 03:44
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