Answer
See below
Work Step by Step
Given: $2x-4y=13\\4x-5y=8$
Multiply both sides of the first equation by $-2$:
$-4x+8y=-26$
Add it to the first equation:
$3y=-18\\
\rightarrow x=-6$
Find y: $2(-6)-4y=13\\
\rightarrow y=-\frac{11}{2}$
Algebra 2 (1st Edition)
by Larson, Ron; Boswell, Laurie; Kanold, Timothy D.; Stiff, Lee
Published by
McDougal Littell
ISBN 10:
0618595414
ISBN 13:
978-0-61859-541-9
Chapter 6 Rational Exponents and Radical Functions - 6.4 Use Inverse Functions - 6.4 Exercises - Mixed Review - Page 445: 59
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