Решите неравенство 20-3(х+5)<1-7х.</p>
20-3(х+5)<1-7x;</em>
20-3x-15<1-7x;</em>
4x<-4;</em>
x<-1;</em>
x∈(-∞;-1).
" alt="20-3(x+5)<1-7x <=> " align="absmiddle" class="latex-formula"> 4x<-4 <=> x<-1" alt="20-3x-15<1-7x <=> 4x<-4 <=> x<-1" align="absmiddle" class="latex-formula">