Respostas

2014-02-24T11:02:29-03:00
2/5 ⇒5÷2 que da   2,5 
                          
2,5₊0,2⇒2,7

2,7⇔7÷2⇒21

1920₊21⇒1920 km



2014-02-24T11:03:23-03:00
2/5x + 1/5x + 1920 = x

1920 = x - 3/5x

2/5x = 1920

2x = 1920 . 5

x = 9600 / 2

x = 4800

Resposta: Paulo percorreu 4800 Km
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