The algebraic equation used to answer this question is: 3d + 4(1/2d) = 56.5 This is because he ran d, the distance, three times that week. For the rest of the four days, he ran 1/2 the distance, or half d. To find the answer, you first distribute: 3d + 2d = 56.5 Add like terms: 5d = 56.5 Divide both side by 5: 5d/5 = 56.5/5 d = 11.3 On the first three days, Luke jogged 11.3 miles. On the remaining days, where he jogged 1/2d, Luke jogged 5.65 miles. Hope this helps!