1-2/5x1-3/2
==> 9/10x>-1/2
==>x>-5/9
②==> 1/2x+3/2≤5x+5
==> 9/2x≥-7/2
==>x≥-7/9
①②取交集
x>-5/9
不等式解集为{x|x>-5/9}