若{x+2y-4z=0}与｛3x+y-z=0｝的解相同,则x:y:z=[ ? ]注：做对了,加★☆100☆★

若(x-z)^2-4(x-y)(y-z)=0,求x+z与y的关系 已知方程组2x-3y-4z=0和x+y+z=0,并且z≠0,求x：y与y：z 若x/2=y/3=z/4不等于0,求x+y+z/x+y-z的值 2x+z=10 x+y-z=4 3x-y-z=0 若xyz≠0且4(x/z)-5(y/z)=-2,(x/z)+4(y/z)=3,求x:y:z 若|x+3|+|y-2|+|2×z+1|=0求(x×z-y×z)(y-x+z)的值 若(4x-3y-3z)^2+|x-3y-z|=0 且xyz不等于0 则4x+y-z/x+y+z 的值 若4x-3y-6z=0,x+2y-7z=0,则x+y+z/3x-y+z=? 证明 ：x/(y+z)+y/(z+x)+z/(x+y)>=3/2其中 x,y,z>0 已知4x-3y-3z=0,① x-3y+z=0,②并且z不等于0,求x：z与y：z 若x+y+z=3y=2z,则x/x+y+z=? 若x,y,z成等差数列,则(z-x)^2-4(x-y)(y-z)= x+2y=3x+2z=4y+z 求x:y:z x+y/2=z+x/3=y+z/4 x+y+z=27 {2x+y=10 {x-y+z=4 {3x-y-z=0 1.若3x-2y+z=2;3x+2y+5z=4,求x+22.若x-3y+z=0;3x-3y-4z=0,求x: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= 已知方程组4x-3y-3z=0 x-3y+z=0 而z不等于0,请问x:y与y:z是多少