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mskyeg Group Title

What is the solution of the system of equations?

  • one year ago
  • one year ago

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  1. mskyeg Group Title
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    • one year ago
  2. hartnn Group Title
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    what have u tried ? tried elimination method ?

    • one year ago
  3. hartnn Group Title
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    subtract eq. 1 from eq. 3, what u get ?

    • one year ago
  4. mskyeg Group Title
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    z=-3

    • one year ago
  5. hartnn Group Title
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    that is correct! need further help? because its just now 2 variables to solve and u will have 3 equations for it...

    • one year ago
  6. mskyeg Group Title
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    oncause this is where i got stuck when i did it previously

    • one year ago
  7. mskyeg Group Title
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    one sec

    • one year ago
  8. mskyeg Group Title
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    x=-9/5 - y

    • one year ago
  9. hartnn Group Title
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    that u got from 2nd equation, right ? what is 3-4z= ? not -9, i suppose...

    • one year ago
  10. mskyeg Group Title
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    ya i got it from the second equation but i just got -5y+5y=24 after plugging it in that would mean that 0=24 which makes no sense

    • one year ago
  11. hartnn Group Title
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    can u show your working, so that i may point out the error. and di u understand how x=-9/5 - y is incorrect, it should be x=5-y

    • one year ago
  12. hartnn Group Title
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    *did

    • one year ago
  13. mskyeg Group Title
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    5x+5y+4z=3 5x+5y+4(-3)=3 5x+5y-12=3 5x+5y=-9 5x=-9-5y shouldn't that then equal x=-9/5-y because Im dividing both parts by 5???

    • one year ago
  14. mskyeg Group Title
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    oooooh oops i just realized my error

    • one year ago
  15. hartnn Group Title
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    so did u get x=5-y ?

    • one year ago
  16. mskyeg Group Title
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    5x+5y+4z=3 5x+5y+4(-3)=3 5x+5y-12=3 5x+5y=15 5x=15-5y x=3-y

    • one year ago
  17. hartnn Group Title
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    oops. u are correct

    • one year ago
  18. robtobey Group Title
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    @mskyeg Would posting the final solutions be satisfactory?

    • one year ago
  19. hartnn Group Title
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    now plug hat in 1st equaion

    • one year ago
  20. hartnn Group Title
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    *that

    • one year ago
  21. hartnn Group Title
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    3(3-y)+2y+(-3)=7 and u get y

    • one year ago
  22. mskyeg Group Title
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    y=-1???

    • one year ago
  23. hartnn Group Title
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    yes :)

    • one year ago
  24. mskyeg Group Title
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    thanks so much:)

    • one year ago
  25. hartnn Group Title
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    welcome ^_^

    • one year ago
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