SOLUTION: Hi. I have a question about solving linear equations. How would you solve X+Y=4? If you can help me solve just that one, then Ill know how to do the rest. Thanks Alot Sara

Question 15044: Hi.
I have a question about solving linear equations. How would you solve X+Y=4? If you can help me solve just that one, then Ill know how to do the rest.
Thanks Alot
Sara
Answer by rapaljer(4671) (Show Source): You can put this solution on YOUR website!
The equation x+y=4 is in what is called "standard form" where you have an x term plus (or minus) a y term = a number term. When this happens, I think the easiest way to graph it (usually) is to graph the two easiest points that you can, the x and y intercepts. The first points is found by letting x= 0 and find y (that would be the y-intercept!). Second point is found by letting y=0 and find x (that would be the x-intercept!).

In this case, if x = 0, y = 4.
If y=0, then x = 4.

Plot these two points: (0,4) and (4,0). Connect the points with a line, and continue the line in both directions. It should look like this:

R^2 at SCC
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