2M-3N=7,那么8-2M+3N=多少
4个回答
1
8-2m +3n变形为 8-(2m-3n)
2m-3n=7
所以答案就是1了
相关问题
2m-3n=5 8-2m+3n=多少
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)
解方程组:{3m-2n=8 4(3m-2n)+7n=46
如果m-3n+4=0 求(m-3n)^2+7m^3-3(2m^3n-m^2n-1)+3(m^3+2m^3n-m^2n+n
若m-2n=-3,求(7m^4n-28m^3n^2+28m^2n^3)/-7m^2n 的值
3m+2n=7 3m-n=5m=?n=?
(2m+n)(2m-n)+n(2m+n)-8m^2n^3/(2n^3) m=-2分之1,n=2013
解方程:2m-7n=8,3m-8n-10=0
已知3/4M=2/3N那么M:N=( ):( ),N/M=