an Identity
equivalency
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equal equations.
equivalent equations
A statement that two quantities are equal is called an equation. In mathematics, an equation typically consists of two expressions separated by an equal sign, indicating that the values of the two expressions are the same. Equations are fundamental in algebra and are used to solve for unknown variables by performing various operations to maintain the equality of the quantities involved.
Addition and subtraction are mathematical processes. They can be used in equations, which are statements that the values of two mathematical expressions are equal, but they are not equations by themselves.
A system of linear equations.