如题有3个方程,我就分开打了X:Y=3:2Y:Z=5:4X+Y+Z=66
x:y=3:2 ①y:z=5:4 ②x+y+z=66 ③(大括号我就不会打了)
2x+y+3z=383x+2y+4z=564x+y+5z=66
若x,y,z满足方程租3x+7y-z=3 4x+10y-z=2 求x+y-z
x=y/z=z/3,x+y+z =12,求2x+3y+4z是多少,
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
若x+2y-4z=0 3x+y-z=0 求x:y:z
三元方程求救要过程2x+3y+z=383x+4y+2z=564x+5y+z=66x:y=5:3x:z=7:32x-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,
xy/x+y=1,yz/y+z=2,xz/x+z=3求x,y