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Linear AlgebraHardRow Reduction & Rank

Row Reduction & Rank · Hard problem

Solve the system   −2x−2y−3z=−10,4x−3y−1z=−15,−1x−1y+2z=−5\;-2x - 2y - 3z = -10, \quad 4x - 3y - 1z = -15, \quad -1x - 1y + 2z = -5. What is zz?