3m-2n-3=0,则6n-9m-4=
2个回答
3m-2n-3=0 两边同时乘以-3
-9m+6n+9=0 1式
因为题目要求-9m+6n-4,1式-13 即是答案.
-13
相关问题
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2m-3n/3m+5n=3 则(4m-6n/18m+30n)+9m+15n/4m-6n的值是多少
已知2m-3n/3m+n=2,求4m-6n/9m+3n+18m+6n/4m-6n的值
(m²-6mn+9n²)÷(m-3n)-(4m²-9n²)-(2m-3n)怎么做
(m²-6mn+9n²)÷(m-3n)-(4m²-9n²)÷(2m-3n)化简,
已知9m^2-6mn+n^2=0,则分式m+3n/2n-3m的值是
分解因式:9n^2m-4m^3+6m-9n
-3/4(-m-n)^6+0.1[-(m+n)^2]^3
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(m^2-6mn+9n^2)/(3n-m)-(4m^2-9n^2)/(2m-3n) m=-2 n=2008.化简求值