SOLUTION: Use a matrix approach to solve the system. Express the solutions as 4-tuples of the form (x1, x2, x3, x4) X1-3X2-2X3+X4=-2 -2X1+7X2+X3-2X4=-3 3X1-7X2-3X3+3X4=-2 5X1+X2+4X3-2

Question 1140460: Use a matrix approach to solve the system. Express the solutions as 4-tuples of the form
(x1, x2, x3, x4)
X1-3X2-2X3+X4=-2
-2X1+7X2+X3-2X4=-3
3X1-7X2-3X3+3X4=-2
5X1+X2+4X3-2X4=16

Answer by MathLover1(20850) (Show Source): You can put this solution on YOUR website!

your matrix:

Find the pivot in the 1st column in the 1st row:

Eliminate the 1st column:

Find the pivot in the 2nd column in the 2nd row:

Eliminate the 2nd column:

Make the pivot in the 3rd column by dividing the 3rd row by :

Eliminate the 3rd column

Make the pivot in the 4th column by dividing the 4th row by :

Eliminate the 4th column:

Solution set:

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