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Linear AlgebraHardRow Reduction & Rank

Row Reduction & Rank · Hard problem

Solve the system   0x+4y−1z=8,1x+3y+3z=−7,2x−1y+0z=3\;0x + 4y - 1z = 8, \quad 1x + 3y + 3z = -7, \quad 2x - 1y + 0z = 3. What is zz?