若2/3x^5m+2n+2y^3与-3/4x^6y^3m-2n-1的和是单项式,则m= ,n= .
问题描述：
若2/3x^5m+2n+2y^3与-3/4x^6y^3m-2n-1的和是单项式,则m= ,n= .
答
若2/3x^5m+2n+2y^3与-3/4x^6y^3m-2n-1的和是单项式
5m+2n+2=6
3=3m-2n-1
解得
m=1
n=-1/2