SOLUTION: I have been working on this for days. If anyone can help, I would appreciate it. I have to show all of my work. Solve using addition, Cramers Rule or matrix. 2x + y - 3z + 4s

Algebra ->  Matrices-and-determiminant -> SOLUTION: I have been working on this for days. If anyone can help, I would appreciate it. I have to show all of my work. Solve using addition, Cramers Rule or matrix. 2x + y - 3z + 4s      Log On


   



Question 83333: I have been working on this for days. If anyone can help, I would appreciate it. I have to show all of my work.
Solve using addition, Cramers Rule or matrix.
2x + y - 3z + 4s + t = -2
3x + 2 y - 2z - s + 2t = 7
x - y + z - 2s - 2t = 0
-x - 2y - z + 2s + t = 5
2x + 2y - 2z +s + 2t = 3


Found 2 solutions by jim_thompson5910, stanbon:
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
Here is a solution generated by the "Step-by-Step Linear Equations, Matrices and Determinants" solver which can be found here.
Let x=x%5B1%5D, y=x%5B2%5D, z=x%5B3%5D, s=x%5B4%5D, t=x%5B5%5D
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Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Solve using addition, Cramers Rule or matrix.
2x + y - 3z + 4s + t = -2
3x + 2 y - 2z - s + 2t = 7
x - y + z - 2s - 2t = 0
-x - 2y - z + 2s + t = 5
2x + 2y - 2z +s + 2t = 3
---------------------------
Matrixis the easiest way to go:
Form a 5x5 coefficient matrix = A
Form a 5x1 constant matrix = B
-----------------
EQUATION:
Form A^-1B = C
C has the solutions for x,y,z,s,t
x=2
y=-3
z=1
s=-1
t=4
=========================
Cheers,
Stan H.