计算x/(y+z)=y/(x+y+1)=z/(x+y-1)的值同上.说得清楚详细些,千万千万不要跳步骤,反正要让我看得懂.答案上是1/2和-1好象要分类讨论的，什么当x+y+z=0时，x+y+z≠0时，

计算x/y+x=y/x+z+1=z/x+y-1的值 已知 x/(y+z)+y/(z+x)+z/(x+y)=1求 (x*x)/(y+z)+(y*y)/(x+z)+(z*z)/(x+y)=? (x+y-z)(x-y+z)= 计算（x+y-z)(x-y-z) 计算：(x-y+z)(-x+y+z) X+Y+Z=? x/y=(x+z)/(y+z)y/z=(x+y)/(x+z) x y=21 z y=24 x y z=32如何计算 (y+z)/x=(z+x)/y=(x+y)/z求x+y-z/x+y+z的值 {x+y-z=11 y+z-x=5 z+x-y=1 {x+y-z=11,x-y-z=-5,x-y+z=1 x=y; y=z; z=x/y 分式加减的几道题目求速度1 .(x+y)²/（x-z)(y-z) - (y+z)²/（x-z)(y-z) = 2.2x+3y/x-y+2y/y-x-3y/x-y= 用乘法公式计算(x+y)(x-y)+(-y-z)(-y+z)+(-x+z)(z+x) 计算：（X+y+z)(-x+y+z)(x-y+z)(x+y-z) 计算(x+y+z)(-x+y+z)(x-y+z)(x+y-z) 计算(x+y-z)(z-x-y) ,(x+y-z)(z-x+y) z+=x>y?++x: