Question

Решите неравенство:
$2.3a+0.8\ \textless \ \frac{5.8a+3.4}{2}$

Answer 1

$2,3a+0,8\ \textless \ \frac{5,8a+3,4}{2}\\\\2(2,3a+0,8)\ \textless \ 5,8a+3,4\\4,6a+1,6\ \textless \ 5,8a+3,4\\4,6a-5,8a\ \textless \ 3,4-1,6\\-1.2a\ \textless \ 1,8\\a\ \textgreater \ 1,8:(-1,2)\\a\ \textgreater \ -1,5\\a\in(-1,5;+\infty)$