Question 556670: x+y=11
x-y=7
Answer by kkasko(46)   (Show Source):
You can put this solution on YOUR website! Step 1: Isolate for variable y
x+y=11
-x. -x
y=-x+11
x-y=7
-x. -x
-y=-x+7
Cannot have a -1 so divide by -1
y=-x/-1+7/-1
y=x-7
Step 2: draw a x and y axis
Plot the first equation at (0,11) and go down 1 right one till you have gone as far right as possible. Then from (0,11) go up 1 left 1 and go as far left as possible.
Plot the second equation at (0,-7) go up 1 right one until you have gone as far right as possible. Then from the point (0,-7) go down one left one until you have gone as far left as possible.
Step 3: the points should now connect at (9,2)
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