SOLUTION: how would I solve and graph these x+y=-3, and x+y=7

Question 636851: how would I solve and graph these
x+y=-3, and x+y=7
Answer by KMST(5328) (Show Source): You can put this solution on YOUR website!
Those are linear equations.
The graph of a linear equation is a straight line.
To draw each line you just need two points.
To find a point, you just pick a value for the or the , and solve for the other variable.
Choose values that make the calculations and the graphing easy.
Zero is often a good choice.
Finding points to graph
When , --> .
That gives you point (0,-3).
When , --> .
That gives you point (-3,0).
Finding points to graph
When , --> .
That gives you point (0,7).
When , --> .
That gives you point (7,0).
The graph (with the points circled, looks like this:
The line for is drawn in blue.
The lines are parallel.
As a system of linear equations,
has no solution.
That should be obvious from the start, because if is ,
it cannot be at the same time (for the same and ).
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