SOLUTION: solve the system of equations by graphing. then classify the system x+y=13 x-y=5

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Question 212880: solve the system of equations by graphing. then classify the system
x+y=13
x-y=5
Answer by rapaljer(4671) About Me  (Show Source):
You can put this solution on YOUR website!
To graph equations in standard form as these are, I think the easiest way to graph is the TWO-Intercept Method. Find the intercepts for each equation, and graph them:

x+y=13
If x=0, then y=13
If y=0, then x=13

x-y=5
If x=0, then y=-5
If y=0, then x=5

Now graph these points and connect the dots!!! It should look like this:
graph%28300%2C300%2C+-15%2C15%2C+-15%2C15%2C+13-x%2Cx-5%29


The lines intersect in a single point, so the system is said to be "Independent". The solution is the point (9,4).

R^2