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Mathematics 9 Online
OpenStudy (anonymous):

write in simplest form. 7r+3(6+2r)+9

jimthompson5910 (jim_thompson5910):

7r+3(6+2r)+9 7r+3(6)+3(2r)+9 7r+18+6r+9 (7r+6r)+(18+9) 13r+27 So 7r+3(6+2r)+9 = 13r+27

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