anonymous
  • anonymous
Can someone help me out with this system? x+y=23 9x-7y=27
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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abb0t
  • abb0t
I am sure you are familiar with method of substitution and or elimination, yES?
anonymous
  • anonymous
yes @abb0t
abb0t
  • abb0t
Which one are you more comfortable working with here?

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abb0t
  • abb0t
LOOOOL!
anonymous
  • anonymous
@abb0t substitution is the one I am more comfortable with
abb0t
  • abb0t
Ok. Well then here, this is what you will do you have two equations: \(\sf \color{red}{x+y=23}\) \(\sf \color{blue}{9x-7y=27}\) what you're going to do is rearrange one of those, i would suggest the one in red, to \(\sf \color{red}{y=23-x}\). notice that you have y = f(x). Take that f(x) - function and plug it into the blue equation! And solve for \(x\). \(\sf \color{blue}{9x-7(}\)\(\sf \color{red}{23-x}\)\(\sf \color{blue}{)=27}\) you know what to do now. distribute, solve for \(x\).
anonymous
  • anonymous
@abb0t you are awesome! Thanks
abb0t
  • abb0t
Once you solve for \(x\). You get a numerical value. That numerical valye that you get for \(x\). You can now use to solve for \(y\) in equation red.
abb0t
  • abb0t
You can always check if your values are correct or not correct by plugging in the values for \(x\) and \(y\)! They should equal 23 or 27! If they do not, then you did something wrong. Good luck.

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