若4x-3y-6z=0,x+2y-7z=0(xyz不等于0),则代数式2x+y/2x-y的值等于?
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/03 00:43:24
![若4x-3y-6z=0,x+2y-7z=0(xyz不等于0),则代数式2x+y/2x-y的值等于?](/uploads/image/z/320308-52-8.jpg?t=%E8%8B%A54x-3y-6z%3D0%2Cx%2B2y-7z%3D0%28xyz%E4%B8%8D%E7%AD%89%E4%BA%8E0%29%2C%E5%88%99%E4%BB%A3%E6%95%B0%E5%BC%8F2x%2By%2F2x-y%E7%9A%84%E5%80%BC%E7%AD%89%E4%BA%8E%3F)
若4x-3y-6z=0,x+2y-7z=0(xyz不等于0),则代数式2x+y/2x-y的值等于?
若4x-3y-6z=0,x+2y-7z=0(xyz不等于0),则代数式2x+y/2x-y的值等于?
若4x-3y-6z=0,x+2y-7z=0(xyz不等于0),则代数式2x+y/2x-y的值等于?
由4x-3y-6z=0,x+2y-7z=0得:11y-22z=0
即y=2z
也可得:11x-33z=0
即x=3z
带入得:原式=(6z+2z)/(6z-2z)
=8z/4z
又因为xyz≠0
所以z≠0
所以原式=2
不懂欢迎追问,