6x=4y=3z x+2y+3z=80
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6x=4y=3zx+2y+3z=806x=4y=3zx+2y+3z=806x=4y=3zx+2y+3z=806x=4y=3z(1)x+2y+3z=80(2)由(1)可得:6x=4y,则y=6x/4=1
6x=4y=3z x+2y+3z=80
6x=4y=3z x+2y+3z=80
6x=4y=3z x+2y+3z=80
6x=4y=3z (1)
x+2y+3z=80 (2)
由(1)可得:
6x=4y,则y=6x/4=1.5x
6x=3z,则z=6x/3=2x;
分别代入(2)得:
x+2*(1.5x)+3*2x=80
10x=80
x=8
那么,y=1.5x=1.5*8=12
z=2x=2*8=16
所以,方程组的解是:
x=8
y=12
z=16
x+y/2=z+x/3=y+z/4 x+y+z=27
x+2y=3x+2z=4y+z 求x:y:z
3x-y+z=4,2z+3y-z=12,x+y+z=6的解
已知(x+y)(x+z)=x,(y+z)(y+x)=2y,(z+x)(z+y)=3z,求x,y,z
试证明(x+y-2z)+(y+z-2x)+(z+x-2y)=3(x+y-2z)(y+z-2x)(z+x-2y)
x+y+z=6 x+2y+3z=14 y+1=z
三元一次方程x+y+z=0 4x+2y+z=3 9x+3y+z=6x+y+z=04x+2y+z=3 9x+3y+z=6
2x+z=10 x+y-z=4 3x-y-z=0
x=y/z=z/3,x+y+z =12,求2x+3y+4z是多少,
6x=4y=3z x+2y+3z=80
2x-y+2z=6 3x+y-3z=-4 x+y+z=6
x+y+z=4 2x+3y-z=6 3x+2y+2z=10
x+y-z=6 x-3y+2z=1 3x+2y-z=4 阿
x+y-z=6,x-3y+2z=1,3x+2y-z=4
X+y-z=6;x-3y+2z=0;3x+2y-z=4
x+y-z=6 x-3y+2z=1 3x+2y-z=4
2x-y+2z=-17 3x+y-3z=-4 x+y+z=6
2x-y+2z=-17 3x+y-3z=-4 x+y+z=6