Chapter 3 - Solving Inequalities - 3-4 Solving Multi-Step Inequalities - Practice and Problem-Solving Exercises - Page 192: 55

All possible x values are: -5, -4, -3, -2, -1

Step 1) Area of a triangle = base x height Step 2) Area of the triangle = 12(x+6) Step 3) Area of the triangle ≤ 72 Step 4) 12(x+6) ≤ 72 Step 5) x+6 ≤ 6 Step 6) x ≤ 0 Step 7) x > -6 and x ≤ 0 Step 8) The final answer is all numbers between -6 and 0