(7X^2Y^3-8X^3Y^2Z)除以8X^2Y^2

1除以x+2除以y+3除以z=5,3除以x+2除以y+1除以z=7,则求（1除以x+1除以y+1除以z）的值 (7X^2Y^3-8X^3Y^2Z)除以8X^2Y^2 已知x除以2=y除以3=z除以4,且x≠0,求x+y+z除以x-2y+3z的值, 已知x除以2=y除以3=z除以-7≠0 （x+y）除以2=（y+z）除以3=（z+y）除以4,x+y+z=27这个方程怎么解啊. x除以2=y除以3=z除以5 2x+y+3z=88 求x = y = z= x除以2=y除以3=z除以5 2x+y+3z=88 求x = y = z= 已知（x+y)除以2=(y+z)除以3=(x+z)除以4,且2x+4y+6z=100,则xyz分别是多少? xy除以x+y等于2,xz除以x+z等于3,yz除以y+z等于4,求x,y,z 的值 已知x+2y-3z=0,2x+3y+5z=0,求(x+y+z)除以（x-y+z) 已知x+2y-3z=0,2x+3y+5z=0,求(x+y+z)除以（x-y+z) 已知2x+3y-4z=0,3x+4y+5z=0,求x+y+z/（除以）x-y+z的值. 已知2x+3y-4z=0,3x+4y-5z=0.求x+y+z除以x-y+z, 已知X除以3等于Y除以4等于Z除以5,求X加Y除以X减2Y加3Z 已知3x+2y除以2=2y+z除以3=3z+x除以7,求(x+y+z):(3x+2y)的值 已知x+2y-3x=0,2x+3y+5z=o.求x+y+z除以x-y+z x+y+z=0,2x-y-7z=0,求分式3xy-4z的平方除以x的平方-y的平方 {x+y+z=1;x+3y+7z=-1;z+5y+8z=-2