SOLUTION: x + y = 0 x - y + 2 = 0 This is really confusing me! I get that x=0 and y=0. Is this right? If not then what is correct? How would I graph it? Very urgent. Can you h

Question 984332: x + y = 0
x - y + 2 = 0
This is really confusing me! I get that x=0 and y=0. Is this right? If not then what is correct? How would I graph it? Very urgent. Can you help me right now? My email is lifeisgood4a@cotc.net
Thank you!
Found 3 solutions by macston, Fombitz, solver91311:
Answer by macston(5194)   (Show Source): You can put this solution on YOUR website!
.
x+y=0 (red line on graph)
x=-y
.
x-y+2=0 Substitute for x. (green line on graph)
-y-y+2=0
-2y=-2
y=1
.
x=-y
x=-1
.
ANSWER:(-1,1)

Answer by Fombitz(32388)   (Show Source): You can put this solution on YOUR website!
No it's not right.
Check using the original equations.

True, so far, so good.

False, so this can't be the solution.
.
.
.
Add the two equations together to eliminate y.

Then use either equation to solve for .

(-1,1)
.
.
.
Graph the two equations.

.
.

.
.

.
.

Answer by solver91311(24713)   (Show Source): You can put this solution on YOUR website!

What makes you think that and ? could be 100 Billion if is negative 100 Billion from the first equation alone, and the second equation tells you that they can't both be zero because that would mean that which would mean that which would cause a catastrophic rip in the space-time continuum. I don't think you want to be responsible for the utter destruction of the universe, do you?

Put both equations into standard form, that is:

Now, just since you have two of the same variable with opposite signs, you can add the two equations and eliminate the variable altogether. , , and , hence:

which is to say:

You should be able to handle discovering the value of from here. Once you know you can substitute that value into either of your original equations and then solve for .

Be careful. The fate of the universe is in your hands.

John

My calculator said it, I believe it, that settles it

RELATED QUESTIONS
Please help me! I am stuck and don't know if I'm doing this right and it's due... (answered by jim_thompson5910)
3x-2y>0 if x =0 then y=-0/3, if y=0 then x=-0/2 is this... (answered by stanbon)
Hi,my name is Natalia. I solved two problems, but I'm not sure that I did it right. I... (answered by venugopalramana)
what is the equation of this line? question: find the equations of the line described. (answered by Fombitz)
If I have graphed x,y cordinates of (5,6) and (5,6)would this make the slope of the... (answered by checkley71)
Evaluate each function for x= -2, 0, and 5. 1.) y = 9+ x 2.) y = x^2 - 1... (answered by jim_thompson5910,vertciel)
I am not sure if I am plugging in my test points correctly. FOr example on y<-x+1 I... (answered by jim_thompson5910)
This is my problem... Solve the system by graphing. 3x + y = 6 3x � y = 0 This... (answered by stanbon)
determine the equation of the line containing the points (0,2) and (2,0) when i did this... (answered by jim_thompson5910)