Answer
The answer is below.
Work Step by Step
We simplify the second equation.
$$-x+y=-4 \\ -x + y +4 = 0 \\x-y=4$$
Since this simplifies to the first equation, we see that the two equations are equations for the same line.
Elementary Algebra
by Kaufmann, Jerome; Schwitters, Karen;
Published by
Cengage Learning
ISBN 10:
1285194055
ISBN 13:
978-1-28519-405-9
Chapter 8 - Coordinate Geometry and Linear Systems - 8.2 - Graphing Linear Equations - Problem Set 8.2 - Page 343: 47
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