Question 29202: Solve the system by graphing.
3x + y = 6
3x – y = 0
Answer by bmauger(101)   (Show Source):
You can put this solution on YOUR website! For the first equation  set x=0 and:
 so plot (0,6)
Then set y=0 and:
 and plot (2,0) Draw a line through (0,6) and(2,0)
Do the same thing for the other equation  , setting x & y equal to 0. Unfortunately, you'll find that point (0,0) is a point on this line. So you'll need to convert the equation into point-slope form. Rewritting as:
subtract 3x from both sides:
 Multiply both sides by -1.
 So you graph a line with a y-intercept and a slope of 3.
When you're done it should look like:
Now look to where they intersect, it looks like point (1,3) so the answer to the equation is: x=1, y=3...
Check:
 Check.
 Check.
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