作业帮已知2x+y+3z=125,x+4y+5z=185,求x+2y+3z的值大神们帮帮忙
来源：学生作业帮助网 编辑：作业帮 时间：2024/11/16 20:41:22
x){}K*+l
Lu*M*Ml Sg*@RgP-FO?9FO'< ?i{}ӟԎ56yK{c֥:@!`l\m{:*h$ف ?0.
已知2x+y+3z=125,x+4y+5z=185,求x+2y+3z的值大神们帮帮忙
已知2x+y+3z=125,x+4y+5z=185,求x+2y+3z的值大神们帮帮忙
已知2x+y+3z=125,x+4y+5z=185,求x+2y+3z的值大神们帮帮忙
2式乘以2和一式相减,得出Y+Z=35,再把 Y+Z=35带入一式,X+Z=45,x+2y+3z=X+Z+2（Y+Z）=45+70=115
已知(x+2y)/3=(y+3z)/4=(z+5x)/5,则x:y:z=
已知x+2y/3=y+3z/4=z+5x/5,则x:y:z=?
已知x+2y/3=y+3z/4=z+5x/5,则x:y:z=
已知{x-5y+2z=0 3x-5y-4z=0,求x：y:z
已知X:Y:Z=3:4:5,求4X+3Y-2Z/X+Y+Z的值
已知2x+5y+4z=6 3x+y-7z=-4求x+y-z
已知x+4y-3z=0,4x-5y+2z=0,则x：y：z
已知x+4y=3z,4x-5y=-2z,则x:y:z
已知方程组4x-5y+2z=0 x+2y=3z 则x:y:z
已知2x+5y+4z=15.7x+y+3z=14 则x+y+z=?
已知x/4=y/5=z/6 求x+y+z/3x-2y+z的值
已知x/4=y/5=z/6,求x+y+z/3x-2y+z的值.
已知x-y/x+y=y+z/2(y-z)=z+x/3(z-x),求证8x+9y+5z=0THX..
已知：4x-5y+2z=0 x+4y-3z=0则：(x*x+y*y+z*z)/(x*y+y*z+z*x)=____.
已知x+4y+3z=3x-2y-5z=0,求x+2y-z/2x-3y+7z的值
已知关于x y z的方程组2x-3y+5z=7 x+2y-3z=8,则4x+y-z=
已知4x-3y-6z=0,x+2y-7z=0,求5x+2y-z/2x-3y-10z
已知3x+4y+5z=0,2x+3y-4z=0,求(x+y+z)/(x-y+z)