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Write the given system as a matrix equation and solve by using the inverse coefficient matrix. Use a graphing utility to perform the necessary

Write the given system as a matrix equation and solve by using the inverse coefficient matrix. Use a graphing utility to perform the necessary calculations. 17x1 13x1 - + 28x3 = 12 20x2 + 50x3 = 22 34x1 + 3x2 - 4x3 = 42 Find the inverse coefficient matrix. A- (Round to four decimal places as needed.)

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