2x+y-3z=-11 x+2y+z=4 3x-3y+2z=25

2x+y-3z=-11
2x=-11-y-32
x=-11/2-y/2+3/2z
x=11+y/2+3/2z

x+2y+z=4
x=4-2y-2
x=2-2y

3x-3y+2z=25
3x=25+3y-2z
x=25/33y-2/3z
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