若6m+8n-5=8m+6n,化简|m-n|-(m+n)怎么做?

问题描述:

若6m+8n-5=8m+6n,化简|m-n|-(m+n)怎么做?

6m+8n-5=8m+6n 化得m-n=-5/2 <0 所以原式为 -(m-n)-(m+n)=-2m