anonymous
  • anonymous
Solve: x+y+z=561.5; 3.35y+5.6z=373; 5.6x+2.25y=2769.9; 3.35x+2.25z=1505.66 Pl find x,y and z.
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
what grade u in? ahhh this is hard...sorry this isnt much help.
NotTim
  • NotTim
are these al lthe same values for x,y, and z? IS this vectors (i don't remember vectors well)?
anonymous
  • anonymous
ya

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NotTim
  • NotTim
both?
anonymous
  • anonymous
linear equations
anonymous
  • anonymous
Make x the subjext for the last equation and y the subject for the second equation. Then sub those into the first equation.
anonymous
  • anonymous
YOu will get everything in z for the first equation once you do what I told you.
NotTim
  • NotTim
why not rearrange 1 of the equations that has 3 variables, and then substitute in another equation with 2 variables?
anonymous
  • anonymous
Then you can solve for z and finally you can find y. and then x at the end.
anonymous
  • anonymous
i tried all equations are coming same
NotTim
  • NotTim
well ,azteck's got this one covered.
anonymous
  • anonymous
\[3.35x+2.25z=1505.66\] \[3.35x=1505.66-2.25z\] \[x=449.45 -\frac{45}{67}z\]
anonymous
  • anonymous
ok
anonymous
  • anonymous
Do the same thing for the second equaiton but in the second equation, make y the subject.
anonymous
  • anonymous
I got to go somewhere. Toodles. Good luck with that.
anonymous
  • anonymous
thanks

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