This document discusses consumer equilibrium from a utility perspective. It defines total utility and marginal utility, and explains the law of diminishing marginal utility. Consumer equilibrium occurs when marginal utility of a good is equal to its price for a single good, or when the ratio of marginal utilities equals the ratio of prices for two goods. Examples are given showing consumption schedules and how equilibrium is reached graphically. The document provides essential definitions and concepts regarding consumer equilibrium in utility theory.