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2014-08-03T13:48:44-03:00
5x+3x=16
8x=16
x=16/8
x=2
10 4 10
2014-08-03T13:50:19-03:00
5x + 3x = 16
8x = 16
x = 16
       8 
x = 2
11 4 11