Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (3rd Edition)

Published by Pearson
ISBN 10: 0-32193-104-1
ISBN 13: 978-0-32193-104-7

Chapter 10 - Systems of Equations and Inequalities - Chapter Review - Review Exercises - Page 814: 3

Answer

$(x,y)=(2,-1)$

Work Step by Step

$ x-2y-4=0 ~~~ (1)$ $3x+2y-4=0~~~ (2)$ Add the two equations to evaluate the value of $x$. $4x=8 \implies x=2$ Plug $x=2$ back into one of the equations and solve for y. Thus, $2-2y-4=0 \\ 2y= -2 \\ y=-1$ Therefore, $(x,y)=(2,-1)$
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