Answer :

[tex]w+2.3>18 \\\\ w>18-2.3 \\\\ w> 15.7 \\\\ \boxed{w=(15.7;\infty)} [/tex]
luana
[tex]w-\ number\\\\ w+2,3>18\ \ \ | subtract\ 2,3\\\\ w>15,7\\\\Number\ w \in(15,7;+\infty)[/tex]

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