5m/(2m-n)-(m-n)/(n-2m)+6n/(2m-n)

问题描述:

5m/(2m-n)-(m-n)/(n-2m)+6n/(2m-n)

5m/(2m-n)-(m-n)/(n-2m)+6n/(2m-n)
=5m/(2m-n)+(m-n)/(2m-n)+6n/(2m-n)
=(5m+m-n+6n)/(2m-n)
=(6m+5n)/(2m-n)