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A student has correctly simplified an algebraic expression in the following steps between each pair of steps ,identify the algebraic property that justifies moving from one step to the next 2(m+9)+7m(2m+18)+7m(18+2m)+7m18+(2m+7m)18(2+7)m

User Davit Sargsyan
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From the given steps used in simplifying the algebraic expression, let's identify the algebraic property that

User Evanescence
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