Algebra 1

Published by Prentice Hall
ISBN 10: 0133500403
ISBN 13: 978-0-13350-040-0

Chapter 9 - Quadratic Functions and Equations - 9-5 Completing the Square - Standardized Test Prep - Page 566: 56

Answer

$16$

Work Step by Step

$x+y=20$ ...(1) $3x-2y=40$ ...(2) From equations (1) and (2), we have $y=(20-x)$ Plug $y=(20-x)$ in $3x-2y=40$ . $3x-2(20-x)=40$ $3x-40+2x=40$ $5x=40+40$ $x=16$
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