Question

Приёмы решения неравенства x * 3 > 12

Answer 1

X>12:3
x>4
(4;до + бесконечности)

Answer 2

$x*3\ \textgreater \ 12\\x*\frac{3}{3}\ \textgreater \ \frac{12}{3}\\x\ \textgreater \ 4$ или [x; +∞]