anonymous
  • anonymous
THIS SHOULD BE SO SIMPLE FOR ME BUT ITS NOT MEDAL+FAN What is the solution to the system of equations? x+y=5 x-2y=2 (___), (___)
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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mathwizzard3
  • mathwizzard3
I think the answer is no solution.
anonymous
  • anonymous
its not multiple choice it only has a place for me to type the solution. :/
phi
  • phi
why don't you multiply the bottom equation by -1 (that means both sides and *every* term by -1) then add the two equations what do you get ?

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anonymous
  • anonymous
k hold on
anonymous
  • anonymous
i'm not sure...
phi
  • phi
multiply the bottom equation by -1 what do you get ?
anonymous
  • anonymous
-x-(-2y)=-2?
phi
  • phi
yes, and -(-2y) is +2y, so you can write it as -x+2y= -2 now add the top equation: x+ y=5 -x+2y= -2 can you add them ?
anonymous
  • anonymous
just add 5 and -2?
phi
  • phi
yes, on the right side but also add the left sides and put an = sign in
anonymous
  • anonymous
3y=3?
phi
  • phi
yes because x+-x + y + 2y simplifies to 0+3y or 3y on the left side, and 5-2 =3 on the right side 3y=3 now divide both sides by 3
anonymous
  • anonymous
1y=1?
anonymous
  • anonymous
or y=1
phi
  • phi
yes, but people usually don't bother to write 1y. they say y y=1 now use either equation (I choose the simplest one) x+y=5 put in 1 instead of y: x+1= 5 now add -1 to both sides and simplify
anonymous
  • anonymous
x=4?
phi
  • phi
yes, so the solution is x=4, y=1 or as an (x,y) pair, the answer is (4,1)
anonymous
  • anonymous
thank you so much!! I have one more question like this one can you help me?
phi
  • phi
if you type fast
anonymous
  • anonymous
ok lol ill open another question

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