Question: 3. Write the following systems in array form and derive the reduced row-echelon form in each case. Then find the solutions to each set of

3. Write the following systems in array form and derive the reduced row-echelon form in each case. Then find the solutions to each set of equations.

(a) 2x 0 - x2 x2 + x3 + 2x4 = 100 x1 + 2x2 + 2x3 60 -x1 + x3 - X4 -10

(b) x1 + x2 + X3 = 0 x2 = 20 -x1 + 2x3 = 10

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