Precalculus (10th Edition)

Published by Pearson
ISBN 10: 0-32197-907-9
ISBN 13: 978-0-32197-907-0

Chapter 11 - Systems of Equations and Inequalities - Chapter Review - Review Exercises - Page 794: 6

Answer

$\{(2,3)\}$

Work Step by Step

We are given the system of equations: $\begin{cases} 2x+3y-13=0\\ 3x-2y=0 \end{cases}$ Bring the system to standard form: $\begin{cases} 2x+3y=13\\ 3x-2y=0 \end{cases}$ Use the elimination method. Multiply the first equation by 2, multiply the second equation by 3, and add them to eliminate $y$ and find $x$: $2(2x+3y)+3(3x-2y)=2(13)+3(0)$ $4x+6y+9x-6y=26$ $13x=26$ $x=2$ Substitute $x=2$ in the first equation of the given system to determine $y$: $2x+3y=13$ $2(2)+3y=13$ $4+3y=13$ $3y=9$ $y=3$ The solution set is: $\{(2,3)\}$
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