1) 8 2/7 - 5а > 0
-5a>-8 2/7
a<-8 2/7 : (-5)<br>a<58/35<br>а<1 23/35 при а < 1 23/25<br>----
2) 9.3 + 4a>0
4a>-9.3
a>-9.3 / 4
a> -2.325 при a> -2.325
----
3) 11 3/11 - 31a >0
-31a>-11 3/11
a< -11 3/11 : (-31)
a<124/341 <br>----
4)11,11 + 11a > 0
11a>-11,11
a> -11,11 /11
a> -1,01
----
5) 7 2/15 + 2/3 a >0
2/3a> -7 2/15
a> -107/15 : 2/3
a> -107/10
a> -10.7
---
6) 50.5-0.5a>0
-0.5a>-50.5
a<-50.5 : (-0.5)<br>a<101<br>