1. **State the problem:** We have four stacks of cubes with heights 5, 4, 7, and 8 cubes respectively. 2. **Goal:** Rearrange the cubes so that each of the four stacks has an equal number of cubes. 3. **Step 1: Calculate the total number of cubes.** $$5 + 4 + 7 + 8 = 24$$ 4. **Step 2: Divide the total cubes equally among the 4 stacks.** $$\frac{24}{4} = 6$$ 5. **Step 3: Use \cancel to show division simplification:** $$\frac{\cancel{24}}{\cancel{4}} = 6$$ 6. **Answer:** Each stack will have 6 cubes after rearrangement. This means the cubes can be redistributed so that each stack has exactly 6 cubes, making all stacks equal in height.