anonymous
  • anonymous
What is the solution to the system of equations? https://static.k12.com/bank_packages/files/media/mathml_d676641518b9981930709d538c634ae09a39918d_1.gif (_____,_____)
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
i will medal and fan plz help i do not know!
Vocaloid
  • Vocaloid
2x + y = -3 x - 2y = -4 start by multiplying the first equation by 2, and tell me what you get
anonymous
  • anonymous
ok one sec

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anonymous
  • anonymous
is it 4?
Vocaloid
  • Vocaloid
no, I'm just asking you to multiply an equation by 2 just take the equation 2x + y = -3 and double everything
Vocaloid
  • Vocaloid
what is 2x*2 = ?
anonymous
  • anonymous
oh ok my bad i replacd y hold on
anonymous
  • anonymous
4x
Vocaloid
  • Vocaloid
good. now we double y to get 2 and double -3 to get -6 so our new equation becomes 4x + 2y = -6, with me so far?
anonymous
  • anonymous
yes i am writing this down
Vocaloid
  • Vocaloid
now we have: 4x + 2y = -6 x - 2y = -4 now add the two equations together and tell me what you get
anonymous
  • anonymous
so like 4x + 2y = -6 + x - 2y = -4???
Vocaloid
  • Vocaloid
um, no...
anonymous
  • anonymous
oh....
Vocaloid
  • Vocaloid
add the x's, then add the y's. 4x + x = ?
anonymous
  • anonymous
oh ok ok ok i get it
anonymous
  • anonymous
one sec
anonymous
  • anonymous
for the x's i got 5x and for the y's i got 5y
anonymous
  • anonymous
is that it?
Vocaloid
  • Vocaloid
5x is right, 5y is not.
anonymous
  • anonymous
oh
anonymous
  • anonymous
what did i do wrong?
Vocaloid
  • Vocaloid
what is 2y - 2y = ?
anonymous
  • anonymous
oh minus... i added
anonymous
  • anonymous
and that is 0
Vocaloid
  • Vocaloid
good, now we add the numbers on the right side of the equations
Vocaloid
  • Vocaloid
-6-4 = ?
anonymous
  • anonymous
-10
Vocaloid
  • Vocaloid
good. so 5x = 10 x = ?
Vocaloid
  • Vocaloid
*sorry, 5x = -10
anonymous
  • anonymous
oh -2?
Vocaloid
  • Vocaloid
good, so x = -2 now we can take one of our original equations: x - 2y = -4 and plug in x = -2 -2 - 2y = -4 y = ?
anonymous
  • anonymous
1?
Vocaloid
  • Vocaloid
yup! so our answer is x = -2 and y = 1 we can write this as (-2,1)
anonymous
  • anonymous
oh so the answer is -2,1 but what happened to 5x?
anonymous
  • anonymous
oh wait nvm
anonymous
  • anonymous
sorry i know we solved that for 5x=10 me bad
anonymous
  • anonymous
thank you!

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