如果m+n=-2m-3n,则m：n=

如果m和n互为相反数,则m+2m+3m+4m+5m+5n+4n+3n+2n+n= 已知3m=2n,则m/(m+n)+n/(m-n)-n^2/(m^2-n^2)=? 如果m+3n=-2m-3n,则m:n= 如果m+n=-2m-3n,则m：n= 已知3m=4n,则m/m+n+n/m-n-m^2/m^2-n^2= m/n=7/3则m+n/m-n (m-n)^3(n-m)^2(m-n)=_____ 如果m,n互为相反数,求m+2m+3m+4m+5m+5n+4n+3n+2n+n=多少 (3m-n)(m-2n)=() (m-2n/n-m)-(n/m-n)= m-[n-3m-(m-n)]=? 如果实数m不等于n,且8m+n/8n+m=,则m+n=8m+n/8n+m=m+1/n+1， 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|=n-m,且|m|=4,|n|=3,则m+n=? 已知m+n=2012(m-n),则m+n/2(m-n)=? 2m+3n+2m+3n+m+2m+3n+n=______ (m-2n)(2n+m)-(-3m-4n)(4n-3m)=