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Linear AlgebraHardRow Reduction & Rank

Row Reduction & Rank · Hard problem

Solve the system   1x+2y+0z=6,−3x+4y−2z=−12,1x+2y+1z=8\;1x + 2y + 0z = 6, \quad -3x + 4y - 2z = -12, \quad 1x + 2y + 1z = 8. What is yy?