若m-3n+4=0,则3(m-n)-2(2m-3n)+2的值为?
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若m-3n+4=0,则3(m-n)-2(2m-3n)+2的值为?若m-3n+4=0,则3(m-n)-2(2m-3n)+2的值为?若m-3n+4=0,则3(m-n)-2(2m-3n)+2的值为?m-3n
若m-3n+4=0,则3(m-n)-2(2m-3n)+2的值为?
若m-3n+4=0,则3(m-n)-2(2m-3n)+2的值为?
若m-3n+4=0,则3(m-n)-2(2m-3n)+2的值为?
m-3n+4=0
m-3n=-4
3(m-n)-2(2m-3n)+2
=3m-3n-4m+6n+2
=-m+3n+2
=-(-4)+2
=6
已知3m=4n,则m/m+n+n/m-n-m^2/m^2-n^2=
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