1146.
.................................
-17х+42,5-31,5+140х=93-82+123х
123х+11=11+123х - верно
1147.
..................................
-10х+40<12-6x-3x<br>0.16x-4.8> -18+0.3x+0.3x
-10x+9x<12-40<br>0.16x-0.6x>4.8-18
-x< -28
-0.44x> -13.2
x>28
x<30<br>
28<x<30