Angiii
Angiii Angiii
  • 14-11-2016
  • Mathematics
contestada

4x+4y=0
2x+y=-2
Solve the linear system by using subtitution

Respuesta :

bartdrinksmalk
bartdrinksmalk bartdrinksmalk
  • 14-11-2016
[tex]4x+4y=0[/tex]
[tex]2x+y=-2[/tex]

We'll use [tex]2x+y=-2[/tex]⇒[tex]y=-2x-2[/tex]

Plug into the other formula:
[tex]4x+4(-2x-2)=0[/tex]
⇒[tex]4x-8x-8=0[/tex]
⇒[tex]-4x-8=0[/tex]
⇒[tex]-4x=8[/tex]
⇒[tex]x=-2[/tex]

Plug [tex]x[/tex] in to get [tex]y[/tex]:
[tex]y=-2(-2)-2[/tex]
⇒[tex]y=4-2[/tex]
⇒[tex]y=2[/tex]

So our solution is [tex]x=-2[/tex], [tex]y=2[/tex]
Answer Link

Otras preguntas

Simplify the following expression completely using distribution and combining like terms3m -2(5+3m)+m​
We talk about cousins like these for a while, but we go on finally to people we knew more intimately, people whose characters have left us, even after all these
I need help will mark the brainliest
Mixed-methods studies are a combination of which two methodologies?
how did the declaration of independence affect Native Americans?
megasporophyll consists a body called nuclei !how are the nuclei protected​
In 1999 total revenue of a company from music sales and licensing was $14.3 billion. It was forecasted that this number would continue to drop until it reached
Write the number 11 as a fraction with the denominator of 15.
Karl's team score is 39 points. this was one point less than twice Todd's score. find Todd's score
Question 4 of 10 What is the value of y? A. 920 B. 460 C. 440 D. 889