The Law of Equi-Marginal Utility states that consumers will allocate their limited income across different goods in a way that equalizes the marginal utility per rupee spent. Specifically: 1) Consumers will distribute their income so that the marginal utility derived from the last rupee spent on each good is equal. 2) They will continue reallocating spending until marginal utility per rupee is equal across all goods, reaching an equilibrium that maximizes total satisfaction. 3) This equilibrium is expressed as: Marginal Utility of Good X / Price of X = Marginal Utility of Good Y / Price of Y.