接下列三元一次方程组(1)y=2x-7 (2)3x-y+2z=3 (3)3x-y+z=4 (4)x+y=3 (5)x+2y=45x+3y+2z=4 2x+y-3z=11 2x+3y-2z=12 y+z=5 2x+3z=133x-4z=4 x+y+z=12 3x+2y=66 x+z=5 3y+z=6
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![接下列三元一次方程组(1)y=2x-7 (2)3x-y+2z=3 (3)3x-y+z=4 (4)x+y=3 (5)x+2y=45x+3y+2z=4 2x+y-3z=11 2x+3y-2z=12 y+z=5 2x+3z=133x-4z=4 x+y+z=12 3x+2y=66 x+z=5 3y+z=6](/uploads/image/z/3973261-13-1.jpg?t=%E6%8E%A5%E4%B8%8B%E5%88%97%E4%B8%89%E5%85%83%E4%B8%80%E6%AC%A1%E6%96%B9%E7%A8%8B%E7%BB%84%281%29y%3D2x-7+%282%293x-y%2B2z%3D3+%283%293x-y%2Bz%3D4+%284%29x%2By%3D3+%285%29x%2B2y%3D45x%2B3y%2B2z%3D4+2x%2By-3z%3D11+2x%2B3y-2z%3D12+y%2Bz%3D5+2x%2B3z%3D133x-4z%3D4+x%2By%2Bz%3D12+3x%2B2y%3D66+x%2Bz%3D5+3y%2Bz%3D6)
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接下列三元一次方程组(1)y=2x-7 (2)3x-y+2z=3 (3)3x-y+z=4 (4)x+y=3 (5)x+2y=45x+3y+2z=4 2x+y-3z=11 2x+3y-2z=12 y+z=5 2x+3z=133x-4z=4 x+y+z=12 3x+2y=66 x+z=5 3y+z=6
接下列三元一次方程组
(1)y=2x-7 (2)3x-y+2z=3 (3)3x-y+z=4 (4)x+y=3 (5)x+2y=4
5x+3y+2z=4 2x+y-3z=11 2x+3y-2z=12 y+z=5 2x+3z=13
3x-4z=4 x+y+z=12 3x+2y=66 x+z=5 3y+z=6
接下列三元一次方程组(1)y=2x-7 (2)3x-y+2z=3 (3)3x-y+z=4 (4)x+y=3 (5)x+2y=45x+3y+2z=4 2x+y-3z=11 2x+3y-2z=12 y+z=5 2x+3z=133x-4z=4 x+y+z=12 3x+2y=66 x+z=5 3y+z=6
(1)y=2x-7
5x+3y+2z=4
3x-4z=4 .z=(3x-4)/4
5x+3(2x-7)+(3x-4)/2=4
25x/2=27
x=54/25
y=-67/25
z=31/50
用代入法接下列二元一次方程组:3分之x=y,2(x+1)-y=6
解下列三元一次方程组x+y-z=0,x+2y-z=3
解下列三元一次方程组x=2y,2x-z=7,y-3z=10
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解下列三元一次方程组.(1)2x+2y+z=4,2x+y+2z=7,x+2y+2z=-6.解下列三元一次方程组.(1)2x+2y+z=4,2x+y+2z=7,x+2y+2z=-6.
接下列三元一次方程组 :a:b=7:2① a:c=7:3② a-b+c=16③
数学题——三元一次方程组{x:y=1:5/3 {y:z=5:6 {x+y+2z=40 三元一次方程组这个怎么解请把步骤列好、用加减消元法
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解下列三元一次方程组 x-y-z=1 2x+y-3z=4 3x-2y-z=-1
接下列三元一次方程组(1)y=2x-7 (2)3x-y+2z=3 (3)3x-y+z=4 (4)x+y=3 (5)x+2y=45x+3y+2z=4 2x+y-3z=11 2x+3y-2z=12 y+z=5 2x+3z=133x-4z=4 x+y+z=12 3x+2y=66 x+z=5 3y+z=6
解三元一次方程组:x-y+z=7 2x-y-z=0 x+y=-1
解下列三元一次方程组:x/2=y/3=z/5,3x-y+2z=26
j解下列三元一次方程组:Y=2x-7 5x+3y+2z=2 3x-4z=4
y=2x-7 5x+3y+2z=2 x+4z=4 解下列三元一次方程组,
解下列三元一次方程组x:y=5:3,x:z=7:2,x-2y+3z=46
解下列三元一次方程组x:y=5:3,x:z=7:2 ,x-2y+3z=46
解下列三元一次方程组:(1)x-z=4,x+y-z=-1,2y-z=1 (2)3x+4z=7,2x+3y+z=9,x-y+z=8