2|1x=3|1y=5|1z 2x+3y-z=24怎么算

已知实数x y z满足x/(x+1)=y/(y+2)=z/(z+3)=(x+y+z)/3,求x+y+z的值 已知实数x y z满足x/(x+1)=y/(y+2)=z/(z+3)=(x+y+z)/3,求x+y+z的值 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= x+y+z=6 x+2y+3z=14 y+1=z {x+y+z=1;x+3y+7z=-1;z+5y+8z=-2 方程组 (1) x+2y-3z=12 x-3y+2z= - 13 x-y-z=0 (2) x+ y=z 5x-y+z=18 2x+5y+3z= -1 x+Y+Z=1 X+3Y+7Z=-1 X+5Y+8Z=2x+Y+Z=1X+3Y+7Z=-1X+5Y+8Z=2 {x+y+z=1 x-2y+3z=5 2x-3y-3z=-8 2x-y+3z=3 {3X+Y-2Z=-1 X+Y+Z=5 x+y+z=-5,3x+y+z=1,4x+3y+2z=-2快 3x+2y+z=14 ,x+y+z=10,z+2x+3y=1 5 x-y+z=-1 5x+2y-z=6 4x-3y+2z=-5 3x-y+2z=-1 4x+y+z=5 x-2y-z=-2 {x+y+z=1 {x+3y+7z=-1 {x+5y+8z=2 x+y+z=2 x-3y+2z=1 2x+2y+z+5 要具体步骤.. x+y+z=-1 4x-2y+3z=5 y-z=8-2x 已知x:y:z=1:3:5,求（2x+3y-z)/(x+y-2z)的值 x:y:z=2:1:5,2x+3y-z=18,求x,y,z,值