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Mathematics 15 Online
OpenStudy (anonymous):

20 times the difference between of 9 and a number

OpenStudy (danjs):

20 * abs(9-x)

OpenStudy (danjs):

abs = absolute value

OpenStudy (mokeira):

20(9-n) multiply everything in the brackets with 20 to simplify and open up

OpenStudy (zzr0ck3r):

\(20|9-x|\)

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