{X:Y=3:2,Y:2=5:4,X+Y+Z=60
2x+y+3z=383x+2y+4z=564x+y+5z=66
x-y-z=0 {x+y-3z=4 2x-5y+7z=21 三元一次方程解
已知x/2=y/3=z/5,且3x+4z-2y=40,求x、y、z的值﹔详解
有关分式的数学题1、已知X/3=Y/5=Z/4,求(X+Y+Z)/Y和(X+Y+Z)/(Y-Z)的值.2、甲乙两人分别从
x=y/z=z/3,x+y+z =12,求2x+3y+4z是多少,
xy/x+y=1,yz/y+z=2,xz/x+z=3求x,y
1.{x+2y=4,2x+5y-2z=11,3x-5y+2z=-1
若x+2y-4z=0 3x+y-z=0 求x:y:z
若x/4=y/3=z/4,且x+y+z=12,求2x+3y+4z
已知方程组{2x-y+z=3,3x+4y-z=8,x+y-2z=-3,
解方程组:2X=3Y Y=2Z X+2Y+Z=16
解三元一次方程组 1.x-y+Z=9 x+2y+z=0 2x-3y-2x=5