Объяснение:
-2y-4}} \right.~~\Longleftrightarrow~~~\left \{ {{8y+4y\leqslant4+8} \atop {5y+2y>-31-4}} \right.\\\\ \\ \left \{ {{12y\leqslant12} \atop {7y>-35}} \right.~~~\Longleftrightarrow~~~\left \{ {{y\leqslant 1} \atop {y>-5}} \right.~~~\Longrightarrow~~~~ \boxed{y\in (-5;1]}" alt="\displaystyle \left \{ {{8y-8\leqslant 4-4y} \atop {31+5y>-2y-4}} \right.~~\Longleftrightarrow~~~\left \{ {{8y+4y\leqslant4+8} \atop {5y+2y>-31-4}} \right.\\\\ \\ \left \{ {{12y\leqslant12} \atop {7y>-35}} \right.~~~\Longleftrightarrow~~~\left \{ {{y\leqslant 1} \atop {y>-5}} \right.~~~\Longrightarrow~~~~ \boxed{y\in (-5;1]}" align="absmiddle" class="latex-formula">