Thinking Mathematically (6th Edition)

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

Chapter 6 - Algebra: Equations and Inequalities - Chapter 6 Test - Page 405: 4

Answer

\[x=2\]

Work Step by Step

Consider the equation\[3\left( 2x-4 \right)=9-3\left( x+1 \right)\]. Apply the distributive law as follows: \[6x-12=9-3x-3\] Or, \[6x-12=6-3x\] Add \[3x\]on both sides to get, \[9x-12=6\] Add \[12\]on both sides to get, \[9x=18\] Divide both sides by 9 to get, \[\begin{align} & x=\frac{18}{9} \\ & =2 \end{align}\] Hence, the solution of the given equation is\[x=2\].
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