解方程组:{x-1/3=y-3/4=z+2/5 2x-3y+2z=1解方程组:{x-1/3=y-3/4=z+2/52x-3y+2z=1
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解方程组:{x-1/3=y-3/4=z+2/5 2x-3y+2z=1解方程组:{x-1/3=y-3/4=z+2/52x-3y+2z=1
解方程组:{x-1/3=y-3/4=z+2/5 2x-3y+2z=1
解方程组:{x-1/3=y-3/4=z+2/5
2x-3y+2z=1
解方程组:{x-1/3=y-3/4=z+2/5 2x-3y+2z=1解方程组:{x-1/3=y-3/4=z+2/52x-3y+2z=1
(X-1)/3=(Y-3)/4=(Z+2)/5;2X-3Y+2Z=1
令(X-1)/3=(Y-3)/4=(Z+2)/5=K
则(X-1)/3=K,X=3K+1
同理,Y=4K+3,Z=5K-2
代入2X-3Y+2Z=1中,
2*(3K+1)-3*(4K+3)+2*(5K-2)=1
6K+2-12K-9+10K-4=1
4K=12
K=3
所以
X=3K+1=3*3+1=10
Y=4K+3=4*3+3=15
Z=5K-2=3*5-2=13
解方程组解方程组{y=2x-7{x+y+z=1{3x-z=4
三元一次方程组x+y+z=1解三元一次方程组x+y+z=1x-y+z=3x+y-z=-1
解方程组 x+y-z=6 〈1〉{x-3y+2z=1解方程组 x+y-z=6 〈1〉{x-3y+2z=1 3x+y-z=4
解方程组 :X+Y-3Z=1 Y+Z-3X=2 Z+X-3Y=3
解方程组x-y-3z=4 3x+y-z=6 -x+3y+z=8
解方程组x-y-3z=4 3x+y-z=6 -x+3y+z=8
解方程组{3x+y-z=4,2x-y+3z=12,x+y+z=6}
解方程组2x+3y-z=12,3x-y+z=4,x+y+z=6
解方程组 x+y+z=2 x-2y+z=-1 x+2y+3z=-1
解方程组:x-2y+z=-1,x+y+z=2,x+2y+3z=-1
解三元一次方程组 x+y+z=1 x-y+z=3 x+y-z=-1
解方程组x+y/2=z+x/3=y+z/4①x+y+z=27②
解方程组:2x+y+z=-4 x+2y+z=-2 x+y+2z=3
解方程组x-4y+z=-3,2x+y-z=18,x-y-z=7.
解方程组 x+y+z=5 2x-y-z=4 3x-2y-z=9
解方程组x+y+z=6 x+2y-3z=4 2x-y+z=5
解方程组:x+y+z=4,x+y+2z=5,3x+y-z=6
解三元一次方程组 x+y-z=11 y+z-x=3 z+x-y=1