Question

Даю 30 балов пж помогите

Answer 1

Ответ:

$5x - 20 < 0 \\ 3x + 18 > 0$

$5x - 20 < 0 = \\ 5x < 20 \\ \div 5 \\ x < 4$

$3x + 18 > 0 = \\ 3x > - 18 \\ \div 3 \\ x > - 6$

$x < 4 \\ x > - 6$

$x∈ < - 6.4 >$