3(x+1)-(x+10) ≤ x

3(x+1)-(x+10) ≤ x 3x+3-x-10 ≤ x 2x-7 ≤ x 2x-x ≤ 7 x ≤ 7

3(x+1)-(x+10) ≤ x 3x+3-x-10 ≤ x 2x-7 ≤ x x _>7

3(x+1)-(x+10) ≤ x 3x+3-x+10≤x 3x-x-x≤-3-10 x≤-13