Question

(3)2x-1 < (9)2x+2 CALCULAR

Answer 1

$3(2x-1)\ \textless \ 9(2x+2) \\ 6x-3\ \textless \ 18x+18 \\ 6x-18x\ \textless \ 18+3 \\ -12x\ \textless \ 21 \\ 12x\ \textgreater \ -21 \\ x \ \textgreater \ -\frac{21}{12} \to x \ \textgreater \ -\frac{7}{4}$