n-m等于-3则4-2m+2n等于几

n-m等于-3则4-2m+2n等于几 若|m-3|+|n+2|等于0,则m+2n等于几 若m减n的绝对值等于n减m,m的绝对值等于4,n的绝对值等于3,则m减n等于几 若3的m次方等于2,9的n次方等于5,则3的2m减4n加1次方等于几, |m-n|=n-m,m的绝对值等于4,n的绝对值等于3,则m-n等于 若m-n=2,mn=35,则m+n等于几? (3m-2n)-(3m-6n+5)等于几 (-m^2n^3)^6/(-m^2n^3)等于 (m-n+3)(m+n-2)等于多少 5m+2n-3m+ n 等于多少? 若n分之m等于2,则m减n分之m加3n等于多少? 已知m-n等于-2,则4-2m+2n等于