解放程组2x-y=7,5x+3y+2z=2,3x-4z=4

解放程组2x-y=7,5x+3y+2z=2,3x-4z=4 解放程：（2X+3Y-Z-2)的绝对值+（3X+2Y-Z-2)的平方+根号(4X-5Y+6Z+17)=0 解放程x+y-z=4,2x-y+x=5,x-3y+x=-2 3x-2y=8,2y+3z=1,x+5z=73x-2y=8,2y+3z=1,x+5z=7 方程,过程, 跪求! 解放程组2X-3Y=X+2=3X+Y x/2=y/3=z/5 x+3y-z/x-3y+z 若X:Y:Z=5:6:7那么(Y-X):(Y+Z)和(X+2Y+3Z):(3X+2Y+Z) {x+y+z=1;x+3y+7z=-1;z+5y+8z=-2 已知x-y/x+y=y+z/2(y-z)=z+x/3(z-x),求证8x+9y+5z=0THX.. x+Y+Z=1 X+3Y+7Z=-1 X+5Y+8Z=2x+Y+Z=1X+3Y+7Z=-1X+5Y+8Z=2 试证明(x+y-2z)+(y+z-2x)+(z+x-2y)=3(x+y-2z)(y+z-2x)(z+x-2y) 已知(x+y)(x+z)=x,(y+z)(y+x)=2y,(z+x)(z+y)=3z,求x,y,z 3x-y=-7,y+2z=2,2x-2z=-5 求x,y,z (4x-2y-z)-{5x-[8y-2z-(x-2y)]-x-(3y-10z)}=? x+y+z=0,3x-2y-2z=5,y-z=2x-7 X-Y-Z=0 X+Y-3Z=4 2X-5Y+7Z=21 2x+5y+4z=6,3x+y-7z=-4,x+y-z=? 3x+7y+4z=35,x+5y+2z=40,x+y+z=( ) {x+y+z=1 {x+3y+7z=-1 {x+5y+8z=2