Answer
$-5x-5z=-16$
Work Step by Step
$2x-3y+2z = 5$ Equation $(1)$
$x-9y+z = -1$ Equation $(2)$
Multiplying Equation $(1)$ by $-3$ and adding Equation $(2)$
$2(-3)x+x-3(-3)y-9y+2(-3)+z = 5(-3) -1$
$-6x+x+9y-9y-6z+z=-15-1$
$-5x-5z = -16$
Intermediate Algebra (6th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321785045
ISBN 13:
978-0-32178-504-6
Chapter 4 - Section 4.3 - Systems of Linear Equations and Problem Solving - Exercise Set - Page 233: 50
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