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Mathematics 8 Online
OpenStudy (rz172):

HELP? WILL MEDAL AND FAN!

OpenStudy (rz172):

OpenStudy (rz172):

I knew it was something like and was told; x-y=x+2 2x-y=4x+2y But I have no idea how to solve this. Could someone show me? or walk me through it?

OpenStudy (mathmale):

I think you posted this very same problem earlier, and that I tried to help you with it. What happened, if that's the case?

OpenStudy (mathmale):

Didn't we work on this problem together earlier? If so, what happened to your previous post?

OpenStudy (mathmale):

"I knew it was something like and was told; x-y=x+2 2x-y=4x+2y Why'd you close that previous post?

OpenStudy (sshayer):

x-y=x+2 y=?

OpenStudy (mathmale):

Follow sshayer's advice. Find y, if x-y=x+2 (above).

OpenStudy (skullpatrol):

Any ideas?

OpenStudy (skullpatrol):

I can only help you if you try :-)

OpenStudy (skullpatrol):

how did you get that?

OpenStudy (rz172):

Move these terms to the left (-x, -2) It becomes x-y-x-2=0 Eliminate x, -x replacing to (1-1) * x-y-2=0 then 0-y-2=0 , -y-2=0, 0=0 y=-2

OpenStudy (3mar):

Well, I am here.

OpenStudy (3mar):

You have now two equations with two variables. \[x-y=x+2 \\2x-y=4x+2y\] Just arrange them: \[\Large{ y=2 \\3y=-2x}\]

OpenStudy (3mar):

@Rz172 Do you follow?

OpenStudy (3mar):

Ok. Step by step. How can you simplify this one? \[\LARGE x-y=x+2 \]

OpenStudy (3mar):

@Rz172 Do you face any difficulties?

OpenStudy (3mar):

Let me know where you are back!

OpenStudy (rz172):

-2?

OpenStudy (3mar):

what equals to -2????

OpenStudy (rz172):

x-y=x+2 = -2? @3mar

OpenStudy (3mar):

Yes That would be like that! \[\Large x-y=x+2\] \[\Large x-y-x=x+2-x\] \[\Large -y=+2\] \[\Large y=-2\] Did you get the idea?

OpenStudy (rz172):

In 2x−y=4x+2y do we put -2 in y or?

OpenStudy (rz172):

If yes, then it's 3?

OpenStudy (3mar):

Yes, that is right! Plug in (y=-2) and tell what you got!

OpenStudy (rz172):

I got 3

OpenStudy (3mar):

You mean: you got (x=3)??

OpenStudy (3mar):

No, it would be x=-3

OpenStudy (3mar):

Thank you for the medal!

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