anonymous
  • anonymous
Solve the system of equations using matrices. Use Gaussian elimination with back-substitution. 3x + 5y - 2w = -13 2x + 7z - w = -1 4y + 3z + 3w = 1 -x + 2y + 4z = -5
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
these are my answers
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arindameducationusc
  • arindameducationusc
4 variables, 4 equations..... you can solve each value...
anonymous
  • anonymous
not really but i can try

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arindameducationusc
  • arindameducationusc
@Vocaloid would you like to try this one?
anonymous
  • anonymous
3x + 5y - 2w = -13 x=3
anonymous
  • anonymous
2x + 7z - w = -1 x=2
anonymous
  • anonymous
sorry x= -2
anonymous
  • anonymous
am i getting these right
anonymous
  • anonymous
@mathmate
anonymous
  • anonymous
-x + 2y + 4z = -5 x=4
arindameducationusc
  • arindameducationusc
no not like that.... i will solve it, wait....
anonymous
  • anonymous
ohh ok
arindameducationusc
  • arindameducationusc
you have to solve one equation for one varialble, here2x=-13-5y+2w now put this in second equation.... 2x+7z-w=-1 =>-13-5y+2w+7z-w=-1
arindameducationusc
  • arindameducationusc
You have to do like this okay?
anonymous
  • anonymous
yeah im lost
anonymous
  • anonymous
@mathmate
anonymous
  • anonymous
is the answer a
arindameducationusc
  • arindameducationusc
suppose x+y=15 and 2x+8y=10 we solve x and y. same way we are solving 4 variables

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