假如 2m=n,4n-2=m 时 m=?n=?
2个回答
2m=n
m=0.5n
将m=0.5n代入4n-2=m
得出
4n-0.5n=2
n=4/7
m=2/7
相关问题
(m-2n)(2n+m)-(-3m-4n)(4n-3m)=
当m=4,n=-5时,求代数式2/3(2m-n)-2(4n-m)+(-3/4)(m+n)的值
(m+2n)(m-2n)(m²-4n²)
(n/m+n/2m^2)*4m/n^2
【(m+n)(m-n)-(m-n²)+2n(m-n)】÷4n
[(m+n)(m-n)-(m-n)²+2n(m-n)]÷4n
lm+n-3l+m^2n^2+4mn+4=0 求(4m-n)(m-2n)-(n-m)(-m-n)
(m-2n)^2+(3m-n)(2m+2n)-(2m+n)(2m-n) 已知m+n=4 mn=1
计算1/(m-n)-1/(m+n)-2n/(m^2+n^2)-4n^3/(m^4+n^4)-8n^7/(m^8+n^8)
计算1/(m-n)-1/(m+n)-2n/(m^2+n^2)-4n^3/(m^4+n^4)-8n^7/(m^8+n^8)