Answer
$3y+8z=18$
Work Step by Step
$2x+y+3z=7$
$2x+y+3z=7$
$2*(2x+y+3z=7)$
$4x+2y+6z=14$
$-4x+y+2z=4$
$4x+2y+6z=14$
$4x+2y+6z+(-4x+y+2z)=14+4$
$4x+2y+6z-4x+y+2z=18$
$3y+8z=18$
Algebra: A Combined Approach (4th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321726391
ISBN 13:
978-0-32172-639-1
Chapter 9 - Section 9.1 - Solving Systems of Linear Equations in Three Variables and Problem Solving - Exercise Set - Page 640: 44
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