1. **State the problem:** Isaac and Seth share 3600 units of money. Seth receives twice as much as Isaac. We need to find how much Seth receives. 2. **Define variables:** Let Isaac's amount be $x$. Then Seth's amount is $2x$ because he gets twice as much. 3. **Set up the equation:** The total money shared is 3600, so: $$x + 2x = 3600$$ 4. **Simplify the equation:** $$3x = 3600$$ 5. **Solve for $x$:** $$x = \frac{3600}{3} = 1200$$ 6. **Find Seth's amount:** Seth gets twice Isaac's amount: $$2x = 2 \times 1200 = 2400$$ **Final answer:** Seth receives 2400 units of money.