已知|x-8y|+2|8z-3x|+2(4y-1)²=0,求x+y+z的值

已知x-y/x+y=y+z/2(y-z)=z+x/3(z-x),求证8x+9y+5z=0THX.. 已知关于x y z的方程组2x-3y+5z=7 x+2y-3z=8,则4x+y-z= 已知4x-3y+z=0,x+2y-8z=0,xyz不等于0,求x+y-z/x-y+2z的值 已知:x+y+z=0,5x-3y-z=0,求:5x-y+z/2x+8y+7z 的值 已知方程组【X:Y:Z=1:3:2,X+Y+Z=8】求Y+3Z的值 已知方程组x:y:z=1:3:2 x+y+z=8 求y+3z的值 已知(x+y)(x+z)=x,(y+z)(y+x)=2y,(z+x)(z+y)=3z,求x,y,z 已知|X-8Y|+2(4Y-1)^2+3|8Z-3X|=0求X+Y+Z 已知|X-8Y|+2(Y-1)^2+3|8Z-3X|=0 求x+y+z 已知|X-8Y|+2(Y-1)^2+3|8Z-3X|=0 求x+y+z 已知3x-4y-z=0,2x+y-8z=0,且z≠0,则x：y：z=（ ） 已知x+7y+8z=3,3x-y+2z=5,求x+y+2z的值x+7y+8z=3,3x-y+2z=5是一个方程组 已知x+2y-z=8,2x-y+z=18 ,求8X+Y-Z的值 已知X+2Y-Z=8,2X-Y+Z=18,则8X+Y+Z= 三元一次方程组题目x+y-z=11 y+z-x=5 x-y+z=1x+y=4 y+z=3 x+z=5若已知x-3y+2z=0 2x+3y-8z=0, 且xyz≠0,则x:y:z= 已知3x-4y-z=0 2x+y-8z=0,x不等于0,则x:y:z的比是多少 2x-{3z-[3x-2(z-y)-(x+8y-6z)]} 已知x,y,z满足2x-y+4z=8,x-2y-z=7,求x-y+z的值.要2种方法