5y-4>или равно 6 4-y< или равно 3 Это система
{5y-4≥6 {4-y≤3 {5y≥6+4 {-y≤3-4 {5y≥10 {-y≤-1 {y≥2 {y≥1 \\\\\\\\\\\\\\\\\\\\\\\\\ ----------- 1 ----------- 2 ----------------- \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ у≥2 или у∈[2; +∞)