ПОМОГИТЕ ПОЖАЛУЙСТА СРОЧНОООО1!1!!!1
1) {7x - 21 ≤ 0,
{ 1 - x > 0;
2) {25 - 5x ≥ 0,
{3 - 18 < 0;
3) {1,2 - 0,6.x >0,
{9х+ 27 ≤ 0.
ДАМ 17 БАЛЛОВ!!1!!1
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