समीकरण म्हणजे दोन पदावल्यांमध्ये समानता सूचित करणारे गणिती विधान असते. समीकरणामध्ये दोन पदावल्यांमध्ये = हे चिन्ह वापरून समानता दर्शवली जाते. उदाहरणार्थ,

In mathematics, an equation is a mathematical formula that expresses the equality of two expressions, by connecting them with the equals sign =. The word equation and its cognates in other languages may have subtly different meanings; for example, in French an équation is defined as containing one or more variables, while in English, any well-formed formula consisting of two expressions related with an equals sign is an equation.