Question: In Exercises, write the given system of linear equations as a matrix equation of the form Ax = b. a. x1 - 2x2 + 3x3

In Exercises, write the given system of linear equations as a matrix equation of the form Ax = b.
a. x1 - 2x2 + 3x3 = 0
2x1 + x2 - 5x3 = 4
b. -x1 + 2x3 = 1
x1 - x2 = - 2
x2 + x3 = - 1

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