Answer
Answers may vary. One pair of equations is $x+y=3$ $x-y=-5$
Work Step by Step
Please see the screenshot of the tables for the two equations.
Purple line: $x-y=-5$
Green line: $x+y=3$
If we substitute the $x$ and $y$ for $-1$ and $4$ respectively, for the purple line:
$x-y=-5$
$-1-4=-5$
$-5=-5$ (true)
Green line:
$x+y=3$
$-1+4=3$
$3=3$ (true)
Purple line:
$x-y=-5$
$x-y+5+y=-5+y+5$
$x+5=y$ ($m=1$, y-intercept is 5)
Green line:
$x+y=3$
$x+y-x=3-x$
$y=-x+3$ ($m=-1$, y-intercept is 3)