Question

Решите неравенство −(3d+4)+(d−11)<0

Answer 1

$-(3d+4)+(d-11)\ \textless \ 0\\-3d-4+d-11\ \textless \ 0\\-2d-15\ \textless \ 0\\-2d\ \textless \ 15\; \; |:(-2)\\d\ \textgreater \ -7,5\\d\in(-7,5;+\infty)$