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Linear AlgebraHardRow Reduction & Rank

Row Reduction & Rank · Hard problem

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