(x-2)×180°÷x+(y-2)×180°÷y+(z-2)×180°÷z=360° 化简是多少?

(x-2)×180°÷x+(y-2)×180°÷y+(z-2)×180°÷z=360° 化简是多少? 已知,方程组:4x-3y-7z=0 x+2y=10z 则(x-y+z)÷(x+y+z)=—— x=y/z=z/3,x+y+z ＝12,求2x+3y+4z是多少, 已知2x+3y+z=130,3x+5y+z=180,试求x+2y/z+y+z【在线等高手解方程】 x+y+z=180x:y:z=1:2:3 y+z÷x=Z+X÷y=X+Y÷z,X+Y+Z不等0求X+Y-Z÷X+Y+z值 2x+3y-4z=-7,(x-4z)÷3=(2y+3z)÷2=2,求X,Y,Z的值 试证明(x+y-2z)+(y+z-2x)+(z+x-2y)=3(x+y-2z)(y+z-2x)(z+x-2y) 已知4x-3y-6z=0 ① ,x+2y-7z=0 ②,且x,y,z均不为0,求3x+2y+z÷x+2y+3z的值 已知2x+3y+z=130,3x+5y+z=180,试求x+2y/x+y+z的值 已知2x+3y+z=130,3x+5y+z=180,试求x+2y/x+y+z的值 要正确的! (y-x)/(x+z-2y)(x+y-2z)+(z-y)(x-y)/(x+y-2z)(y+z-2x)+(x-z)(y-z