In Exercises 2138, solve each system of equations using matrices. Use Gaussian elimination with back-substitution or Gauss-Jordan
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In Exercises 21–38, solve each system of equations using matrices. Use Gaussian elimination with back-substitution or Gauss-Jordan elimination.
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3a + b - 2a + 3b - 5c a - 2b + 3c c= = 0 1 -4
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