Question

como resolver 2× +5<-3× +40

Answer 1

$2x+5\ \textless \ -3x+40\to \\\\ 2x+3x\ \textless \ 40-5\to \\\\ 5x\ \textless \ 35\to \\\\ x\ \textless \ \frac{35}{5} \to \\\\ x\ \textless \ 7\\\\\\ S=\{xER|~x\ \textless \ 7\}$