Answer
F
Work Step by Step
$x+2y=23$
$4x-y=-7$
$4x-y=-7$
$4x-y+7+y=-7+7+y$
$4x+7=y$
$x+2y=23$
$x+2*(4x+7)=23$
$x+8x+14=23$
$9x+14=23$
$9x=9$
$9x/9=9/9$
$x=1$
$x+2y=23$
$1+2y=23$
$2y=22$
$2y/2=22/2$
$y=11$
$(1,11)$
Algebra 1
by Hall, Prentice
Published by
Prentice Hall
ISBN 10:
0133500403
ISBN 13:
978-0-13350-040-0
Chapter 10 - Radical Expressions and Equations - Cumulative Test Prep - Multiple Choice - Page 648: 14
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