SOLUTION: need to solve by graphing: x-y=2 x+y=-4 I know this sounds basic -- but been out of school and for some reason, i can't graph or figure this out! thanks so much

Algebra ->  Graphs -> SOLUTION: need to solve by graphing: x-y=2 x+y=-4 I know this sounds basic -- but been out of school and for some reason, i can't graph or figure this out! thanks so much      Log On


   

Question 243188: need to solve by graphing:
x-y=2
x+y=-4
I know this sounds basic -- but been out of school and for some reason, i can't graph or figure this out!
thanks so much
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
solve by graphing:
x-y=2
x+y=-4
----------
Each eqn is a straight. 2 points is sufficient to plot a straight line.
x-y=2
x = y+2
Pick values for y and find x
y...x
0...2 --> (2,0)
4...6 --> (6,4)
Plot the 2 points and draw a line thru them.
-------------
x+y=-4
y = -x-4
x...y
0...-4 --> (0,-4)
4...0 ---> (4,0)
Draw a line thru the points.
Where they intersect is the solution.