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Question from dipesh, a student:

consider the system of equations
x-6y+2z=5
2x-9y-z=14
4x+12y-3z=19
by reducing the augm matrix to row echelon form, find the solution to the equation.

leaving the first two equations the third is changed to -3x+6y+14z=-31 show the equations have infinitely many solutions and give a general formula for them

Please can you help me with this problem

Dipesh,

Go to the Quandaries and Queries main page and input the word echelon into the Quick Search. Some examples will be returned that illustrate how to reduce an augmented matrix to row echelon form.

For your second question look in particular at my response to Will.

Penny

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