Respostas

2014-03-22T16:13:58-03:00
(x+1/3)=5/7
(3x+ 3)/3 =5/7
3x +3 = 15/7
7(3x+3)= 15
21x+ 21= 15
x=-6/21

(x+1/3)=4/7
(3x+ 3)/3 =4/7
(3x+ 3) =12/7
7(3x+ 3) =12
21x +21 =12
x=-9/21

2014-03-22T17:53:03-03:00