-4n+3m=﹣11 3n-4m=-53

已知3m=4n,则m/m+n+n/m-n-m^2/m^2-n^2= |m-n|=n-m,且|m|=4,|n|=3,则m+n=? (m-2n)(2n+m)-(-3m-4n)(4n-3m)= |m-n|=n-m,且|m|=4,|n|=3,求（m+n)*(m+n)的值 .4（m+n)^2*（m+n)^3-7（m+n)（m+n)^4+5（m+n)^5= -4n+3m=﹣11 3n-4m=-53 m-[n-3m-(m-n)]=? 如果m和n互为相反数,则m+2m+3m+4m+5m+5n+4n+3n+2n+n= 如果m,n互为相反数,求m+2m+3m+4m+5m+5n+4n+3n+2n+n=多少 (m-2n)^2+(3m-n)(2m+2n)-(2m+n)(2m-n) 已知m+n=4 mn=1 |m-4|+|n+3|=0则m-n= (m+4)^2+|n+3|=01/2m-n 1若m=n,则|m|=|n|;2若m=—n,则|m|=|n|;3若|m|=|n|,则m=—n;4若|m|=|n|,则m=n哪个对 若(m-2n)/(2m+n)=3,则[3(m-2n)/(2m+n)-(m-2n)/[2(2m+n)] - {9(m-2n)/[4(2m+n)]}的值是? lm+n-3l+m^2n^2+4mn+4=0 求(4m-n)(m-2n)-(n-m）(-m-n) 2m-{n+[4m-3(m+2n)]}-5n其中m=2/3 n=-4 m-{n+[4m-3(m+2n)]}-5n其中m=2/3 n=-4 若|m-n|=-(m-n),且|m|=4,|n|=3,则m=()；n=()；