anonymous
  • anonymous
x + y = 3k x - y = k The solution of the system shown is _____. (0, 2k) (2k, 0) (2k, k)
Algebra
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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UsukiDoll
  • UsukiDoll
use elimination method
midhun.madhu1987
  • midhun.madhu1987
Add those 2 equations and y will be eliminated and you get the value of x. Substitute the value of x in any equation and find y. Once you get the value of x and y, then the solution will be of the form (x , y)
anonymous
  • anonymous
but what is the answer

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midhun.madhu1987
  • midhun.madhu1987
am so sorry..... i cant provide the answer...
UsukiDoll
  • UsukiDoll
no direct answer ing allowed... but we can guide you :) first add the two equations together. Noticed that a variable will cancel out
anonymous
  • anonymous
why i really need it
UsukiDoll
  • UsukiDoll
because giving a direct answer is against code of conduct and mods will be issuing warnings. that's what.
anonymous
  • anonymous
mmm okay thanks so how i can do that again
UsukiDoll
  • UsukiDoll
x+y =3k x-y=k add them together.
anonymous
  • anonymous
3k=k
UsukiDoll
  • UsukiDoll
no... |dw:1437569730364:dw|
anonymous
  • anonymous
it wiil be llike that x2-y2
UsukiDoll
  • UsukiDoll
the y's should cancel out
UsukiDoll
  • UsukiDoll
|dw:1437569843258:dw|
anonymous
  • anonymous
i don't get it
anonymous
  • anonymous
Look at the y. One y is +y and the other y is -y y - y = 0 so we get ride of the y \( x = 3k \) \( x = k \) Now add those
anonymous
  • anonymous
x + x + ?? and 3k + k = ??
anonymous
  • anonymous
That was x + x = ???
anonymous
  • anonymous
2k,k
anonymous
  • anonymous
x + x = 2x 3k + k = 4k Now we have \(x = 3k \) \(x= k \) \( 2x = 4k\) Now divide by 2 and what do you get for x?
anonymous
  • anonymous
Yes, (2k,k) is the answer
UsukiDoll
  • UsukiDoll
|dw:1437570395517:dw| then plug x = 2k back into the equation (one of them) |dw:1437570428355:dw| so x = 2k and y = k (2k,k)

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