已知X满足:3+3X不小于5X-1X+1除以4不小于-1化简|X-2|+|X+5|

问题描述:

已知X满足:3+3X不小于5X-1X+1除以4不小于-1化简|X-2|+|X+5|

3+3x≥5x-1
5x-3x≤3+1
2x≤4
x≤2
x+1≥-4
x≥-5
∴-5≤x≤2
|X-2|+|X+5|
=2-x+x+5
=7