Variable - A symbol for a value we don't know yet. It is usually a letter like x or y., Constant - A fixed value. (In Algebra, a constant is a number on its own, or sometimes a letter such as a, b or c to stand for a fixed number.), Coefficient - A number used to multiply a variable. (Example: 6z means 6 times z, and "z" is a variable, so 6 is a coefficient.),

Variable Constant Coefficient

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