# Need math help to list the elements of the given set in roster notation #2

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### Question Description

alancheng
School: Rice University

Think of a roster as this list of names that your PE teacher has.

Here,   the equation 7 - x = 9 is the condition for what belongs in the set. If we solve it,

7 - x - 7 = 9 - 7

-x = 2

x = -2

The set is  {-2 },  there is only one element in this set.

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Tutor went the extra mile to help me with this essay. Citations were a bit shaky but I appreciated how well he handled APA styles and how ok he was to change them even though I didnt specify. Got a B+ which is believable and acceptable.

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