Answer
$(c)$
Work Step by Step
y is isolated in equation $1$.
The next step is to substitute y for $4x-7$ in the other equation:
$6x+3(4x-7)=19$
... choice $(c)$
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: 9
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