Answer
... choice (d)
Work Step by Step
Since the y-terms are opposite in the additive sense,
we would eliminate y by adding the equations.
The resulting equation is
$8x=7$
... choice (d)
Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)
by Bittinger, Marvin L.; Ellenbogen, David J.; Johnson, Barbara L.
Published by
Pearson
ISBN 10:
0-32184-874-8
ISBN 13:
978-0-32184-874-1
Chapter 8 - Systems of Linear Equations and Problem Solving - 8.2 Solving by Substitution or Elimination - 8.2 Exercise Set - Page 516: 5
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