4x-3y-6z=0 x+2y-7z=0 求x+y+3z/4x-y-5z
来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:数学作业 时间:2024/07/16 22:30:22
4x-3y-6z=0 x+2y-7z=0 求x+y+3z/4x-y-5z
![4x-3y-6z=0 x+2y-7z=0 求x+y+3z/4x-y-5z](/uploads/image/z/19010992-40-2.jpg?t=4x-3y-6z%3D0+x%2B2y-7z%3D0+%E6%B1%82x%EF%BC%8By%EF%BC%8B3z%2F4x%EF%BC%8Dy%EF%BC%8D5z)
配平方程式:4x-3y-6z=0(1)
x+2y-7z=0 4x+8y-28z=0(2)
(2)-(1)y=2z
8x-6y-12z=0(3)
x+2y-7z=0 3x+6y-21z=0(4)
(4)+(3)x=3z
然后代入=3z+2z+3z/12z-2z-5z=8/5
x+2y-7z=0 4x+8y-28z=0(2)
(2)-(1)y=2z
8x-6y-12z=0(3)
x+2y-7z=0 3x+6y-21z=0(4)
(4)+(3)x=3z
然后代入=3z+2z+3z/12z-2z-5z=8/5
若4x-3y-6z=0,x+2y-7z=0,求代数式5x*5x+2y*2y-z*z/2x*2x-3y*3y-10z*10
已知x+4y+3z=3x-2y-5z=0,求x+2y-z/2x-3y+7z的值
已知有理数x、y、z满足条件|x-z-2|+(3x-6y-7)^2+|3y+3z-4|=0,求x、y、z
4x-3y-6z=0,x+2y-7z=0,xyz的积不等于0,求(x+y-z)/(x-y+2z)的值
已知2x+5y+4z=6 3x+y-7z=-4求x+y-z
5x+3y+2z=2011 4x+6y+7z=2012 求x+y+z
已知4x-3y-6z=0,x+2y-7z=0,且x,y,z≠0,求2x+3y+6z/x+5y+5z的值.
已知3x-2y-5z=0,2x-5y+4z=0,且x,y,z均不为0,求3x*x+2y*y+5z*z/5x*x+y*y-
已知4x-3y-6y=0,x+2y-7z=0.求x-y+z\x+y+z的值
已知{3x+4y+5z=0,2x+3y-4z=0,求x+y+z/x-y+z的值.
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/x-y+z的值.