SOLUTION: Solve the system of equation by graphing. Im lost. x+y=7 x-y=-5

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Question 273711: Solve the system of equation by graphing. Im lost.
x+y=7
x-y=-5
Answer by solver91311(24713) (Show Source):
You can put this solution on YOUR website!

Start with the first equation:

Step 1: Select a value for . It can be anything you like, but the arithmetic is generally simpler if you choose a small integer.

Step 2: Substitute the selected value for in your equation and then solve for .

Step 3: Create an ordered pair using the selected value from Step 1 and the calculated value from Step 2.

Step 4: Plot the point represented by the ordered pair derived in Step 3.

Step 5: Repeat steps 1 through 4 using a different value of .

Step 6: Now that you have two points plotted, draw a straight line all the way across your grid passing through the two plotted points.

Step 7: Repeat steps 1 through 6 using the second equation.

Step 8: The solution set is the ordered pair that represents the point where the two graphed lines intersect.

John