如果m+3n=-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)=? 已知3m=4n,则m/m+n+n/m-n-m^2/m^2-n^2= 如果m+3n=-2m-3n,则m:n= 如果m+n=-2m-3n,则m：n= 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)=() 如果m,n互为相反数,求m+2m+3m+4m+5m+5n+4n+3n+2n+n=多少 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=? 2m+3n+2m+3n+m+2m+3n+n=______ (m-2n)(2n+m)-(-3m-4n)(4n-3m)= 如果m-3n+4=0 求(m-3n)^2+7m^3-3(2m^3n-m^2n-1)+3(m^3+2m^3n-m^2n+n 设m和n为大于0的整数,且3m+2n=225如果m和N的最大公约数为15,则M+N=?如果m和n的最小公倍数为45,则M+N=? .4（m+n)^2*（m+n)^3-7（m+n)（m+n)^4+5（m+n)^5=