Answer
$x=2,y=5$
Work Step by Step
Given: $3x-y=1$ and $x+2y=12$
After subtracting the first equation by thrice times of the second equations, we get
$-7y=-35$
or, $y=5$
Now, $x+2(5)=12$
or, $x=12-10=2$
Thus, $x=2,y=5$
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 - Section 3.2 - Problem Solving and Business Applications Using Systems of Equations - Exercise Set - Page 204: 3
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