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Linear AlgebraHardRow Reduction & Rank

Row Reduction & Rank · Hard problem

Solve the system   0x+0y+3z=0,−3x−1y+2z=−5,3x−2y+2z=−10\;0x + 0y + 3z = 0, \quad -3x - 1y + 2z = -5, \quad 3x - 2y + 2z = -10. What is zz?