1. The problem states that Gwen starts with 10 spools of thread and uses 2 spools per dress sewn. 2. The relationship between dresses sewn ($d$) and spools remaining ($s$) is linear and can be expressed as: $$s = 10 - 2d$$ 3. To find the spools remaining after sewing 2 dresses, substitute $d = 2$: $$s = 10 - 2 \times 2$$ 4. Simplify the expression: $$s = 10 - 4$$ 5. Calculate the final answer: $$s = 6$$ Therefore, Gwen will have 6 spools of thread left after sewing 2 dresses.