a number w added to 2.3 is more than 18
\(w+2.3>18 \\\\ w>18-2.3 \\\\ w> 15.7 \\\\ \boxed{w=(15.7;\infty)}\)
\(w-\ number\\\\ w+2,3>18\ \ \ | subtract\ 2,3\\\\ w>15,7\\\\Number\ w \in(15,7;+\infty)\)
