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X+2y+z=5 2x-y+z=4 3x+y+4z=1
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X+2y+z=5 2x-y+z=4 3x+y+4z=1

User Lukas Nespor
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X=1.5, y=2.5,z=-1.5 I used matrices to solve it.
User Dimitris Siakavelis
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