Question

What is the solution of the system
y=x-4
y=-x

Answer 1

Look that up on google, it will answer it for sure.

Answer 2

http://www.algebra.com/algebra/homework/playground/test.faq.question.428642.html

Answer 3

y=-x.
That means y equals minus x.
If y equals minus x, then in the first equation, it says
y=x-4
There's a letter y in front of the equal sign. In the second equation, it said that y must equal minus x.
So wouldn't you want to replace the y with the minus x?
\[y=x-4\]
\[y=-x\]
\[-x=x-4\]

Answer 4

Azteck could you please help me on my question?

Answer 5

Remember, helping means giving you assistance so that YOU CAN solve the question. I'm only there to help you with the understanding of the question, so then you can answer it yourself.

Answer 6

@AlgebraaaGurl What's your question?

Answer 7

Post it in a separate thread

Answer 8

Don't post it here.

Answer 9

iStill Don't Understand , Like The y=-x Part Confuses Me . Is y=-x Equal To y=-1 Times x ? Cause The Solution Is Supposed To Be In The Form Of A Coordinate Thingy &'d We Have To Graph It &'d Stuff

Answer 10

Come'on. Don't go jumping steps for a moment here. Take it step by step.

Answer 11

maths isn't a race to see who can finish faster. It's about a step by step process.

Answer 12

What does this mean in words:
\[y=-x\]

Answer 13

Lol iKnowww &'d It Means y Equals Negative x

Answer 14

Great.

Answer 15

Now in the first equation you were given. This is what you were given right?
\[y=x-4\]

Answer 16

You just stated, that y equals negative x

Answer 17

Yep Yep

Answer 18

And in that equation I just gave you, there's a y in front of the equal sign.

Answer 19

Couldn't you replace that y with the negative x?

Answer 20

Because you just stated that y equals neagtive x. That means that negative x is y.

Answer 21

OHHHHHHH iGet What You're Saying But iDon't Think iCan Do That Cause We're Supposed To Graph These Two Separate Equations &'d iHave To Figure Out What's The Y Intercept &'d The Slope &'d iCan't Find Anything Out Of y=-x

Answer 22

So you need to graph each one separately?

Answer 23

Yes , The Lines Are Seprate But In The Same Graphs , Like This

Answer 24

Okay.
Can you sketch y=x?

Answer 25

@Niecey

Answer 26

iDon't Understand How

Answer 27

What do you mean you can't draw y=x?

Answer 28

That's the first line you draw when you learn this.