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When Is Subtraction Associative?

Algebra Level 1

\[ \large (a-b) - c = a - (b - c)\]

Suppose \(a, b\) and \(c\) are numeric variables. Under what conditions is the equation above true?

Always true Only true when at least one of the variables is equal to 0 Only true when \(c=0\) Only true when all of the variables are equal to 0 Never true

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by Damon Demas

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