Respostas

2014-04-26T00:31:51-03:00
(x/4)+(x/3)=7
tirando o mínimo
3x/12+4x/12=7
7x/12=7
7x=12.7
x=12
2014-04-26T20:32:09-03:00
X/4 + x/3 = 7
3x/12 + 4x/12 = 7
7x/12 = 7
7x = 84
x = 12