Question 60193
Hi Sher,
I didn't see this one earlier.
Solve the system by graphing:


E1:  x + y = 3
E2:  x + y = -1

 These are parallel lines that never intercect.  This has no solution.
For E1:
Let x=0 and y=?
0+y=3
y=3  Plot (0,3)
Let y=0 and x=?
x+0=3
x=3 Plot (3,0)
Connect the points and you have this line:
{{{graph(300,200,-10,10,-10,10,-x+3)}}}
For E2:
Let x=0 and y=?
0+y=-1
y=-1  Plot (0,-1)
Let y=0 and x=?
x+0=-1
x=-1  Plot (-1,0)
Connect the points and you have a second line that will never intersect the first because the are parallel:
{{{graph(300,200,-10,10,-10,10,-x+3,-x-1)}}}
Happy Calculating, Sher!!!