|5x-15|≥25,
[ {5x-15≥0,
5x-15≥25,
{5x-15<0,
-(5x-15)≥25;
[ {x≥3,
x≥8,
{x<3,
x≤-2;
[ x≥8,
x∈(-∞;-2]U[8;+∞)
|5x-15|≥25,
[ {5x-15≥0,
5x-15≥25,
{5x-15<0,
-(5x-15)≥25;
[ {x≥3,
x≥8,
{x<3,
x≤-2;
[ x≥8,
x≤-2;
x∈(-∞;-2]U[8;+∞)