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Linear AlgebraHardRow Reduction & Rank

Row Reduction & Rank · Hard problem

Solve the system   −2x+4y−2z=−16,−2x+4y+1z=−16,4x−2y+4z=8\;-2x + 4y - 2z = -16, \quad -2x + 4y + 1z = -16, \quad 4x - 2y + 4z = 8. What is xx?