x/2+5>2x. 2x-x/2<5. 3x/2<5. 3x<10. x<10/3. x-3(x-1)≤5. x-3x+3≤5. -2x ≤5-3. -2x ≤2. x≥1.
x/2+5>2x2x-x/2<53x/2<5x<3又1/3 x-3(x-1)≤5x-3x+3≤5-2x≤2x≥-1
