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NashNugs

Solve the System of equations 3x + 3y + 2z = –5 x + y + 3z = –4 2x + 2y + 5z = –7

  • one year ago
  • one year ago

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  1. goformit100
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    |dw:1343833778651:dw|

    • one year ago
  2. mathslover
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    ok so first of all : 3x+3y+2z=-5 3x + 3y = -5-2z 3(x+y)=-5-2z x+y = (-5-2z) ------- 3 x = (-5-2z)/3 - y

    • one year ago
  3. mathslover
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    put this value in the above equations

    • one year ago
  4. annas
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    @mathslover my bro you're the best

    • one year ago
  5. NashNugs
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    whats the graph? The dud who drew the pic? Whats that

    • one year ago
  6. mathslover
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    it is fully dependent on you "which method you want to chose" thanks @annas , there may be mistake as no one is perfect in any field

    • one year ago
  7. NashNugs
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    @mathslover i have no idea what that was haha

    • one year ago
  8. NashNugs
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    i think substitution would work best

    • one year ago
  9. annas
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    you can also use matrix method

    • one year ago
  10. NashNugs
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    ? whats that?

    • one year ago
  11. mathslover
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    @NashNugs seems that you are working on substitution at present so go through that IF you have studied matrices then use the @goformit100 's method

    • one year ago
  12. annas
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    |3 3 2| -5| |1 1 3| -4| |2 2 5| -7| make the row echelon form and you'll get your answers

    • one year ago
  13. NashNugs
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    i have not studies the matrix method. But i found the answer with substitution.

    • one year ago
  14. annas
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    ok it was just for your knowledge :)

    • one year ago
  15. mathslover
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    good then

    • one year ago
  16. NashNugs
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    would the answer be -4,3,-1?

    • one year ago
  17. NashNugs
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    thats what i got, i might have done something wrong tho

    • one year ago
  18. NashNugs
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    is that what you got?

    • one year ago
  19. NashNugs
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    @mathslover

    • one year ago
  20. mathslover
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    yes it seems right to me

    • one year ago
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