{7(2x+4)-2(7x+4)>4x
{(x-7)(x+4)<0<br>
7(2x+4)-2(7x+4)>4x
14x+28-14x-8>4x
36>4x
4x<36<br>x<9<br>
(x-7)(x+4)<0<br>x=7 x=-4
+ - +
----- -4 ------- 7 ---------
\\\\\\\\
x∈(-4; 7)
{x<9<br>{x∈(-4; 7)
\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
------- -4 ----------- 7 ------- 9 ---------
\\\\\\\\\\\\
х∈(-4; 7)
Ответ: х∈(-4; 7)