4x-y+z=25 A ;
6x-z+2y=22 B;
x+3y+z=-2 C;
2A+B,14x+z=72,
3B-2C,16x-5z=70,
86x=430;
X=5,Z=2,y=-3.
{4x-y+z=25,6x-z+2y=22,x+3y+z=-2 蟹蟹
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帮忙解个三元一次方程组,蟹蟹X+2Y+4Z=172X+Y+Z=73X+Y+2Z=11
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4x-y+z=25,6x-z+2y=22,x+3y+z=-2
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2x-y=7 x+y+z=25x+3y+z=2 x-2y+z=-1 3x-4z=4 x+2y+3z=-1x+y-z=6x
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3X-4Y-5Z=18 2X+y-6z=8 X+3Y+Z=22
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x;y;z=2;3;4,2x+y+z=22
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x+y+z=4 3x-y-2z=0 x+2y-z=-6
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X+y-z=6;x-3y+2z=0;3x+2y-z=4
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2x-y+2z=-17 3x+y-3z=-4 x+y+z=6
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2X+2Y+Z=4 X+4Y+3Z=6 X+3Y+2Z=7
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x-4y-z=-3① 2x+y-z=18② x-y-z=6③