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Raja99

  • 3 years ago

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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  1. onedirection
    • 3 years ago
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    what grade u in? ahhh this is hard...sorry this isnt much help.

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

  3. Raja99
    • 3 years ago
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    ya

  4. NotTim
    • 3 years ago
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    both?

  5. Raja99
    • 3 years ago
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    linear equations

  6. Azteck
    • 3 years ago
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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.

  7. Azteck
    • 3 years ago
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    YOu will get everything in z for the first equation once you do what I told you.

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

  9. Azteck
    • 3 years ago
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    Then you can solve for z and finally you can find y. and then x at the end.

  10. Raja99
    • 3 years ago
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    i tried all equations are coming same

  11. NotTim
    • 3 years ago
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    well ,azteck's got this one covered.

  12. Azteck
    • 3 years ago
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    \[3.35x+2.25z=1505.66\] \[3.35x=1505.66-2.25z\] \[x=449.45 -\frac{45}{67}z\]

  13. Raja99
    • 3 years ago
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    ok

  14. Azteck
    • 3 years ago
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    Do the same thing for the second equaiton but in the second equation, make y the subject.

  15. Azteck
    • 3 years ago
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    I got to go somewhere. Toodles. Good luck with that.

  16. Raja99
    • 3 years ago
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    thanks

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