Question

решите неравенство 7(y+3)-2(y+2)>2(5y+1)

Answer 1

$7(y+3)-2(y+2)\ \textgreater \ 2(5y+1) \\\\ 7y+21-2y-4\ \textgreater \ 10y+2 \\\\ -5y\ \textgreater \ -15 \\\\ y\ \textless \ 3 \\\\ y \in (-\infty;3)$