anonymous
  • anonymous
Can someone help me solve this?
Mathematics
chestercat
  • chestercat
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anonymous
  • anonymous
A system of equations is shown below: y = 3x − 7 y = 2x + 1 What is the solution to the system of equations? (8, 17) (−8, 17) (−8, −17) (8, −17)
anonymous
  • anonymous
I need to know how to do this concept later for a test.
anonymous
  • anonymous

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anonymous
  • anonymous
butterflydreamer
  • butterflydreamer
|dw:1433427892039:dw| simplify this.
anonymous
  • anonymous
Then what @butterflydreamer
butterflydreamer
  • butterflydreamer
did you simplify it?
anonymous
  • anonymous
how do you do that ? @butterflydreamer
butterflydreamer
  • butterflydreamer
what does 3x - 7 + 7 equal to?
butterflydreamer
  • butterflydreamer
The -7 + 7 will cancel out.. so you're left with just 3x so we know |dw:1433428826676:dw| Now what does 1 + 7 = ?
anonymous
  • anonymous
butterflydreamer
  • butterflydreamer
yes so now we have: |dw:1433428973058:dw| Now what does: 3x - 2x = ?
anonymous
  • anonymous
1x?
butterflydreamer
  • butterflydreamer
yes exactly :) so : |dw:1433429128261:dw| Now that we know x = 8.. we need to find out what y equals to... To do this plug x = 8 into one of the original equations |dw:1433429158638:dw|
butterflydreamer
  • butterflydreamer
So if we use the equation y = 2x +1 and we plug in x = 8 we will get: y = 2x + 1 y = 2(8) + 1 y = ?
anonymous
  • anonymous
um
anonymous
  • anonymous
17?
butterflydreamer
  • butterflydreamer
yeeeess!!! y = 17 SO to sum it up x = 8 , y = 17 And we're done :) Now put it in the form (x, y ) ---> (8, 17)
anonymous
  • anonymous
great.
anonymous
  • anonymous
Can you help me out with one more thing @butterflydreamer
butterflydreamer
  • butterflydreamer
i would love to but it's actually time for me to go to bed LOl. Sorry! Good luck :)!
dmndlife24
  • dmndlife24
bed?? It's like 11 in the morning over here lol

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