Question

determinati solutiile naturale ale inecuatilor
3(2x-1)<9

Answer 1

$\displaystyle 3(2x-1)\ \textless \ 9 \\ 6x-3\ \textless \ 9 \\ 6x\ \textless \ 9+3 \\ 6x\ \textless \ 12 \\ x\ \textless \ \frac{12}{6} \\ x\ \textless \ 2 \\ x \in \{0;1\}$

Answer 2

$3*(2x-1)\ \textless \ 9 \\ 6x-3\ \textless \ 9 \\ 6x\ \textless \ 9+3 \\ 6x\ \textless \ 12 \\ x\ \textless \ 12:6 \\ x\ \textless \ 2 \\ x\in\{0,1\}$