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What property says that x stands for the same number anywhere it appears in an expression?

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eginarrayl	extIf a variable is present in an algebraic expression, then it takes same value even if it appears more than one place in the expression. \ 	extFor example, the value of x 	extof all the terms in the expression \ 4x^3+5x^2-6x+4 	extis same.endarray

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Deependra Verma

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