已知m-3n=2m+n-15=1,则m=?,n=?
已知3m=2n,则m/(m+n)+n/(m-n)-n^2/(m^2-n^2)=?
已知m-3n=2m+n-15=1,则m=?,n=?
已知m/n=5、,求(m/(m+n))+(m/(m-n))-(n^2/(m^3-n^2))
1,已知3m=4n,则m/m+n +n/m-n -m^2/m^2-n^2=
已知m-2n/2m+n=5,求代数式3(m-2n)/2m+n-15(2m+n)/m-2n-2
已知m/n=5/3 求(1/m+n+1/m-n)÷1/n-n/m-n÷m+n/n的值,
已知:m/n=5/3,求(1/m+n+1/m-n)÷1/n-n/m-n÷m+n/n的值
1、已知|m|=3,n=2.且|m-n|=n-m,则 n-m=( )
已知2m+n分之m-2n=3,则2m+n分之3(m-2n)+3(2m+n)分之m-2n-4(2m+n)分之5(m-2n)
若(m-2n)/(2m+n)=3,则[3(m-2n)/(2m+n)-(m-2n)/[2(2m+n)] - {9(m-2n
已知m-2n=3.求[(3m+2n)(3m-2n)-(m+2n)(5m-2n)]÷1/3 m 的值.
已知m/n=5/3,求m/(m+n)+m/(m-n)-n平方/(m平方-n平方)