3m+2n=7 3m-n=5m=?n=?
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.4(m+n)^2*(m+n)^3-7(m+n)(m+n)^4+5(m+n)^5=
m/n=5/3,求(m/m+n)+(m/m+n)-(n^2/m^2-n^2)
已知m/n=5、,求(m/(m+n))+(m/(m-n))-(n^2/(m^3-n^2))
m/n=7/3则m+n/m-n
(m-n)^3(n-m)^2(m-n)=_____
m-[n-3m-(m-n)]=?
(3m-n)(m-2n)=()
已知3m=2n,则m/(m+n)+n/(m-n)-n^2/(m^2-n^2)=?
已知3m=4n,则m/m+n+n/m-n-m^2/m^2-n^2=
已知m/n=5/3,求m/(m+n)+m/(m-n)-n平方/(m平方-n平方)
3m+2n=7 3m-n=5m=?n=?
m-{n-2m+[3m-(6m+3n)+5n]}=
2m+3n+2m+3n+m+2m+3n+n=______
(m-2n)(2n+m)-(-3m-4n)(4n-3m)=
(m-2n/n-m)-(n/m-n)=
若2m-n/m+2n=5,求3(2m-n)/m+2n-m+2n/2m-n+3的值
若2m-n/m+2n=5,求3(2m-n)/m+2n-m+2n/2m-n+3的值
诺2m-n/m+2n=5,求3(2m-n)/m+2n-m+2n/2m-n+3的值