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Linear AlgebraHardRow Reduction & Rank

Row Reduction & Rank · Hard problem

Solve the system   4x+4y+1z=−2,4x+0y+4z=8,−3x+3y+0z=−3\;4x + 4y + 1z = -2, \quad 4x + 0y + 4z = 8, \quad -3x + 3y + 0z = -3. What is xx?