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Mathematics 13 Online
OpenStudy (anonymous):

Check my answer? http://prntscr.com/4m6jua

OpenStudy (anonymous):

@kirbykirby

OpenStudy (kirbykirby):

B

OpenStudy (kirbykirby):

What they did in the first step was as the end: \(2\cdot x \cdot 11=2\cdot 11 \cdot x\) the interchanges the space of 11 and x, so interchanging the location like that is commutativity (and it's a multiplication operation)

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