SOLUTION: Solve the system by graphing. 3x + y = 6 3x – y = 0

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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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