Respostas

2014-04-23T17:41:50-03:00
x + 3/5 =  4
x + 3 = 4 * 5
x = 20 - 3
x = 17 
2 5 2
2014-04-23T18:06:46-03:00
X+3/5x=4 tirando o mmc
5x/5=3x/5=20/5
5x+3x=20
7x=20
x=20/7