SOLUTION: Solve the system of equations using matrices. Use Gaussian elimination with back-substituting or Gauss-Jordan elimination.
x-9y-z=-17
x-y+z=7
x+y-z=3
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Question 887568: Solve the system of equations using matrices. Use Gaussian elimination with back-substituting or Gauss-Jordan elimination.
x-9y-z=-17
x-y+z=7
x+y-z=3
Found 2 solutions by josgarithmetic, MathTherapy:
Answer by josgarithmetic(39620) (Show Source): You can put this solution on YOUR website!
R2=R2-R1, R3=R3-R1
R2=(1/8)R2, R3=(1/10)R3
Notice that already we have y=2.
Switch R2 and R3
R3=R3-R2
Multiply R3 by 4.
R1=R3+R1
and then
R1=9*R2+R1
---
x=-7
y=2
z=8
Answer by MathTherapy(10552) (Show Source): You can put this solution on YOUR website!
Solve the system of equations using matrices. Use Gaussian elimination with back-substituting or Gauss-Jordan elimination.
x-9y-z=-17
x-y+z=7
x+y-z=3
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