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Augmented matrix

The augmented matrix of a linear system has been reduced by row operations to the form shown. explain step by step no matter how small the detail In each case, continue the appropriate operations and describe the solution set of the original system.
a + b - c = 7, a - b + c = 5, 3a + b - c = -1

Solution Summary

This provides an example of using an augmented matrix to solve a system of equations.