Posted by Casey on Wednesday, March 19, 2008 at 10:24am.
Could someone show me how to solve system of equations by graphing?
9x9y=45
9y9x=45

algebra  drwls, Wednesday, March 19, 2008 at 11:18am
Those two equations are really the same except for a sign change on both sides. They are not independent. Both will plot as the same line on a graph.
Since you have only one line instead of two intersecting lines, there is no single solution. Any x,y combination with yx=5 is a solution.
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