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

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

RELATED QUESTIONS
solve the system of equation by graphing x+y=11... (answered by Fombitz)

solve the system of equation by graphing y=2x-1... (answered by Alan3354)

Solve the system of equations by graphing. Then classify the system. x+y=7 and x-y=5. (answered by Maths68)

Solve the system of linear equations by graphing . -x+y=7... (answered by stanbon)

Solve the system of linear equations by graphing: x+y=5... (answered by Fombitz)

Solve the system of equation by graphing x+y=4... (answered by dfrazzetto)

solve the system of equation by graphing x+y=8... (answered by mananth)

solve the system of equation by graphing. x+y=6... (answered by oscargut)

solve the given system by graphing. x=-5... (answered by EdenWolf)