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Geometry 21 Online
OpenStudy (anonymous):

If 2c + 1 = 11, what is the value of 2c? 4 5 10 12

jimthompson5910 (jim_thompson5910):

Isolate 2c by subtracting 1 from both sides

jimthompson5910 (jim_thompson5910):

You subtract 1 from both sides since +1-1 = 0 and the "+1" effectively goes away

jimthompson5910 (jim_thompson5910):

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