Respostas

2013-10-15T16:33:53-03:00
(     - 1) - 3 = 0       mmc = 4
    4

x - 4 - 12 = 0
x = 12 + 4
x = 16

tirando a prova
x - 4 - 12 = 0
16 - 4 - 12 = 0
16 - 16 = 0
    0 = 0
2013-10-15T17:02:32-03:00
 \frac{(a-1)}{4} -3=0

 \frac{(a-1)}{4} =3

a-1=12\\a=12+1\\a=13

A quarta parte do antecessor de 13 (13-1) 12/4 3-3=0