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NashNugs

  • 3 years ago

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

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  1. goformit100
    • 3 years ago
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    |dw:1343833778651:dw|

  2. mathslover
    • 3 years ago
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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

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

  4. annas
    • 3 years ago
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    @mathslover my bro you're the best

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

  6. mathslover
    • 3 years ago
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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

  7. NashNugs
    • 3 years ago
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    @mathslover i have no idea what that was haha

  8. NashNugs
    • 3 years ago
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    i think substitution would work best

  9. annas
    • 3 years ago
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    you can also use matrix method

  10. NashNugs
    • 3 years ago
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    ? whats that?

  11. mathslover
    • 3 years ago
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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

  12. annas
    • 3 years ago
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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

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

  14. annas
    • 3 years ago
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    ok it was just for your knowledge :)

  15. mathslover
    • 3 years ago
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    good then

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

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

  18. NashNugs
    • 3 years ago
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    is that what you got?

  19. NashNugs
    • 3 years ago
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    @mathslover

  20. mathslover
    • 3 years ago
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    yes it seems right to me

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