Algebra and Trigonometry 10th Edition

Published by Cengage Learning
ISBN 10: 9781337271172
ISBN 13: 978-1-33727-117-2

Chapter 9 - Review Exercises - Page 691: 6



Work Step by Step

We need to isolate $y$ in the second equation. $y=5x-4$ Now, plug the value of $x$ into the first equation. $-5x+2(5x-4)=3 \implies 5x=11$ We get: $x=\dfrac{11}{5}$ We will plug the value of $x$ into the expression of $y$ to find the value of $y$. $y=5(\dfrac{11}{5})-4=7$ Thus, $x=\dfrac{11}{5};y=7$
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