TA'Nija C.

asked • 09/04/19

What does this mean|2x+7|;x=-4

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Nathan B. answered • 09/05/19

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To elucidate on what Mark was saying, | | brackets are used for can be seen as "Just how far away from 0 on the number line is this?" You otherwise treat it as an equation/expression right up until the end. Is the number positive? Then is stays positive. Is it negative? Then it becomes positive, because you are, in this case, one unit away from point 0.

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