[m]\left\{\begin {matrix}2\cdot(6x-1)+3\cdot (x+4) ≤ 30\\27-(1-x) ≥3x \end {matrix}\right.[/m]
Раскрываем скобки
[m]\left\{\begin {matrix}12x-12+3x+12 ≤ 30\\27-1+x ≥3x \end {matrix}\right.[/m]
[m]\left\{\begin {matrix}15x ≤ 30\\x-3x ≥-26 \end {matrix}\right.[/m]
[m]\left\{\begin {matrix}x ≤2\\-2x ≥-26 \end {matrix}\right.[/m]
[m]\left\{\begin {matrix}x ≤2\\x ≤13 \end {matrix}\right.[/m] ⇒[m] x ≤ 2[/m]
Наибольшее целое
[b]2[/b]