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

Mathematics
Tutor: None Selected Time limit: 1 Day

Nov 15th, 2015

Thank you for the opportunity to help you with your question!

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.

Please let me know if you need any clarification. I'm always happy to answer your questions.
Nov 15th, 2015

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Nov 15th, 2015
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