Respostas

2014-08-20T19:30:00-03:00
10-(2x+1)=4(2x+3)
10 - 2x - 1=8x +12
10 - 2x - 1 - 8x - 12 = 0
-10x - 3=0 
-10x=3 (-1)
10x= -3
x= -3/10
x= - 0,3


2014-08-20T20:00:05-03:00
10 - ( 2x + 1 ) = 4 ( 2x + 3 )
10 - 2x - 1 = 8x + 12
- 2x - 8x = 12 - 10 + 1
- 10x = 3 . ( - 1 )
10x = - 3
x = - 3/10
x = - 0,3