Respostas

2013-10-14T17:08:37-03:00
6X -(-4 -7X) = 3X -8
6X +4 +7X =3X -8
13X-3X= -8 -4
10X= -12
X= -12/10=> X= -6/5 E

(2 + X) = - 2/3 
3(2+ X)= -2
6+3X= -2
3X= -2-6
3X=-8=> X= -8/3

2013-10-14T17:11:17-03:00