Solve the system of equations using Gaussian elimination or Gauss–Jordan elimination. Use a graphing calculator to check your answer.
−2w + 2x + 2y − 2z = −10,
w + x + y + z = −5,
3w + x − y + 4z = −2,
w + 3x − 2y + 2z = −6
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College Algebra: Graphs And Models Plus Mylab Math With Pearson Etext -- Access Card Package (6th Edition)
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