Answer
$(a)$
Work Step by Step
Wanting to eliminate x, we multiply the first equation with $-5$,
so the x-terms become opposite. We obtain
$\begin{aligned}-5x+10y&=-15\\5x+3y&=4\end{aligned}$
... choice $(a)$
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: 7
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