Thinking Mathematically (6th Edition)

Published by Pearson
ISBN 10: 0321867327
ISBN 13: 978-0-32186-732-2

Chapter 6 - Algebra: Equations and Inequalities - 6.2 Linear Equations in One Variable and Proportions - Exercise Set 6.2 - Page 363: 103

Answer

\[\left\{ -2 \right\}\]

Work Step by Step

The equation is\[4x+13-\left\{ 2x-\left[ 4\left( x-3 \right)-5 \right] \right\}=2\left( x-6 \right)\]. Use the order of operations, \[\begin{align} & 4x+13-\left\{ 2x-\left[ 4\left( x-3 \right)-5 \right] \right\}=2\left( x-6 \right) \\ & 4x+13-\left\{ 2x-\left[ 4x-12-5 \right] \right\}=2x-12 \\ & 4x+13-\left\{ 2x-\left[ 4x-17 \right] \right\}=2x-12 \\ & 4x+13-\left\{ 2x-4x+17 \right\}=2x-12 \end{align}\] Further simplification, \[\begin{align} & 4x+13-\left\{ -2x+17 \right\}=2x-12 \\ & 4x+13+2x-17=2x-12 \\ & 6x-4=2x-12 \end{align}\] Subtract \[2x\] from both sides of the equal sign, \[\begin{align} & 6x-4-2x=2x-12-2x \\ & 4x-4=-12 \end{align}\] Add\[4\]to both sides of the equal sign, \[\begin{align} & 4x-4+4=-12+4 \\ & 4x=-8 \\ & x=\frac{-8}{4} \\ & x=-2 \end{align}\] Therefore, \[x=-2\] Solution set of the equation \[4x+13-\left\{ 2x-\left[ 4\left( x-3 \right)-5 \right] \right\}=2\left( x-6 \right)\]is \[\left\{ -2 \right\}\].
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