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Standard Form of a Linear Equation

A linear equation in two variables is said to be in standard form when it is written as Ax+By=CAx + By = C. When writing an equation in this form, it is generally preferred—though not strictly required—that AA, BB, and CC are integers and that A≥0A \ge 0. Equations that do not initially appear in this format, such as y=−3x+5y = -3x + 5, can be manipulated using properties of equality to rewrite them into the standard Ax+By=CAx + By = C structure (e.g., 3x+y=53x + y = 5) to easily confirm they are linear equations.

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Updated 2026-06-17

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