Answer
$(1,-3)$
Work Step by Step
We have two equations such as: $x=y+4$ and $3x+7y=-18$
Plug the above value of $x$ in the second equation.
$3(y+4)+7y=-18$
or, $10y=-18-12$
or, $y=-3$
and $x=y+4=-3+4=1$
Hence, $(x,y)=(1,-3)$
Intermediate Algebra for College Students (7th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13417-894-7
ISBN 13:
978-0-13417-894-3
Chapter 3 - Test - Page 250: 3
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