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Linear AlgebraHardRow Reduction & Rank

Row Reduction & Rank · Hard problem

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