若3^2m=9,2^3n=64,求5m+n

已知m/n=5、,求（m/（m+n）)+(m/(m-n))-(n^2/(m^3-n^2)) 若2m-n/m+2n=5,求3（2m-n）/m+2n-m+2n/2m-n+3的值 若(m-2n)/(2m+n)=3,则[3(m-2n)/(2m+n)-(m-2n)/[2(2m+n)] - {9(m-2n 诺2m-n/m+2n=5,求3(2m-n)/m+2n-m+2n/2m-n+3的值 已知m-2n/2m+n=5,求代数式3(m-2n)/2m+n－15(2m+n)/m-2n－2 如果m,n互为相反数,求m+2m+3m+4m+5m+5n+4n+3n+2n+n=多少 若(3m-2n+1)与|5m=2n-n|互为相反数,求m+n的值 5m+3n=8 5m-3n=2,求m+n 已知m-2n=3.求[(3m+2n)(3m-2n)-(m+2n)(5m-2n)]÷1/3 m 的值. 在线等已知m/n=5/3,求m/(m+n)+m/(m-n)-n^2/(m^2-n^2)... 已知m/n=5/3,求分式m/(m+n)+m/(m-n)-n^2/(m^2-n^2)的值 已知m/n = 5/3 求m/(m+n)+m/(m-n)-n^2/(m^2-n^2)等于多少?（要化简全过程）