An equation is a mathematical statement that shows the equality between two expressions. It typically contains variables, numbers, and operations like addition, subtraction, multiplication, or division. For example, in the equation 2x + 3 = 7, the left side represents an expression that equals the right side. Solving the equation involves finding the value of the variable that makes both sides equal. Equations are fundamental in various fields, including science, engineering, and finance. They help describe relationships and solve problems. For instance, in physics, equations can represent motion, while in economics, they can model supply and demand. Understanding equations is essential for analyzing and interpreting data.