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Mathematics 19 Online
OpenStudy (anonymous):

x+11=20

OpenStudy (anonymous):

x + 11 = 20 // start x = 9 // subtract 11 from 20

OpenStudy (anonymous):

x=9

OpenStudy (anonymous):

x=9

OpenStudy (anonymous):

11+9=20

OpenStudy (anonymous):

9 is your answer

OpenStudy (anonymous):

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