m/5-m/2=2 2m+3n=4
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m/5-m/2=2 2m+3n=4
m/5-m/2=2 2m+3n=4
m/5-m/2=2 2m+3n=4
由m/5-m/2=2 等式左右两边同乘以10 可得2m-5m=20 故m=-20/3 将其带入2m+3n=4 可得n=52/9
.4(m+n)^2*(m+n)^3-7(m+n)(m+n)^4+5(m+n)^5=
已知3m=4n,则m/m+n+n/m-n-m^2/m^2-n^2=
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+3m+5m+...+2015m)-(2m+4m+6m+...+2014m)=
m-2m-3m+4m-5m-6m+7m.2004m=?
(m+3m+5m.+2013m)-(2m+4m+6m+.+2012m)=?
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
-5m(-m+3n)+4m(-4m-5/2n),其中m=2,n=-1
(m-2n)(2n+m)-(-3m-4n)(4n-3m)=
(m-n)^3(n-m)^2(m-n)=_____
(m-n)^2*(m-n)^4=?
(3m-n)(m-2n)=()
m-{n-2m+[3m-(6m+3n)+5n]}=
2m-{n+[4m-3(m+2n)]}-5n其中m=2/3 n=-4
3m+4n-[2m+(5m-2n)-3n]其中m=n分之一=2
m-{n+[4m-3(m+2n)]}-5n其中m=2/3 n=-4