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4x3 = 0 In Exercises 15-22, solve the given linear system by any method. 15. 2x1 + x2 + 3x3 = 0 16. 2xy

4x3 = 0 In Exercises 15-22, solve the given linear system by any method. 15. 2x1 + x2 + 3x3 = 0 16. 2xy 3z = 0 - 3z= x1 + 2x2 = 0 -x+2y3z = 0 x2+x3 = 0 x+y+4z = 0

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