Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)

Published by Pearson
ISBN 10: 0-32184-874-8
ISBN 13: 978-0-32184-874-1

Chapter 1-12 - Cumulative Review - Page 846: 4

Answer

The solution of the equation $3\left( 2x-3 \right)=9-5\left( 2-x \right)$ is $8$.

Work Step by Step

Consider the equation. $3\left( 2x-3 \right)=9-5\left( 2-x \right)$ Apply the distributive property. $6x-9=9-10+5x$ Combine the like terms and simplify the terms. $6x-9=-1+5x$ Apply the addition principle: $6x-9-5x=-1+5x-5x$ Simplify the terms. $\begin{align} & 6x-5x-9=-1+5x-5x \\ & x-9=-1 \\ \end{align}$ $\begin{align} & x-9+9=-1+9 \\ & x=8 \end{align}$ Check: Substitute $8$ for $x$ in the given equation. $\begin{matrix} 3\left( 2\left( 8 \right)-3 \right)\overset{?}{\mathop{=}}\,-5\left( 2-8 \right) \\ 3\left( 16-3 \right)\overset{?}{\mathop{=}}\,9-5\left( -6 \right) \\ 3\left( 13 \right)\overset{?}{\mathop{=}}\,9+30 \\ 39=39 \\ \end{matrix}$ It is true.
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