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2014-07-28T22:08:04-03:00
5x+3x=49+15
8x = 64

x = 64 
÷ 8

x = 8
2 4 2
2014-07-28T22:11:13-03:00
5x+3x=64
      8x=64
        x=64/8
        x=8
1 5 1