已知,2(4-x)<-9x,化简|-x-1|-2|3x+2|

问题描述:

已知,2(4-x)<-9x,化简|-x-1|-2|3x+2|

2(4-x)<-9x
8-2x7x所以x所以
|-x-1|-2|3x+2|
=-x-1-2*(-3x-2)
=-x-1+6x+4
=3+5x

2(4-x)<-9x,
8-2x