Raja99
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.



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onedirection
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what grade u in? ahhh this is hard...sorry this isnt much help.

NotTim
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are these al lthe same values for x,y, and z? IS this vectors (i don't remember vectors well)?

Raja99
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ya

NotTim
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both?

Raja99
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linear equations

Azteck
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Make x the subjext for the last equation and y the subject for the second equation. Then sub those into the first equation.

Azteck
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YOu will get everything in z for the first equation once you do what I told you.

NotTim
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why not rearrange 1 of the equations that has 3 variables, and then substitute in another equation with 2 variables?

Azteck
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Then you can solve for z and finally you can find y. and then x at the end.

Raja99
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i tried all equations are coming same

NotTim
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well ,azteck's got this one covered.

Azteck
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\[3.35x+2.25z=1505.66\]
\[3.35x=1505.662.25z\]
\[x=449.45 \frac{45}{67}z\]

Raja99
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ok

Azteck
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Do the same thing for the second equaiton but in the second equation, make y the subject.

Azteck
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I got to go somewhere. Toodles. Good luck with that.

Raja99
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thanks