Respostas

2013-07-05T19:47:30-03:00
5x+2=100 x=19,6
52*19,6= 1019,2
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2013-07-05T19:58:19-03:00
5x+2=100
5x=100-2
x=100-2/5
x=20-0,4
x=19,6
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52.x=52.19,6=1019,2
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