SOLUTION: Subscript notation is frequently used for working with larger systems of equations. Use a matrix approach to solve the system. Express the solutions as 4-tuples of the form (x1,

Question 1169155: Subscript notation is frequently used for working with larger systems of equations. 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 = −4
−2x1 + 7x2 + x3 − 2x4 = −2
3x1 − 7x2 − 3x3 + 3x4 = −5
5x1 + x2 + 4x3 − 2x4 = 20

Answer by greenestamps(13203) (Show Source): You can put this solution on YOUR website!

"Use a matrix approach" means to me one of three possibilities:
A graphing calculator;
Gauss-Jordan elimination;
Cramer's Rule.

All three of those methods are well defined. It does you no good to have us do the work for you and tell you the answer; and it uses a lot of our valuable time.

Choose a method (the graphing calculator is by far the easiest!) and work the problem yourself.

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