Respostas

2013-04-24T00:40:42-03:00

2+3[x-(3x+1)]=5[x-(2x-1)]

5[x-3x-1]=5[x-2x+1]

5x-15x-5=5x-10x+5

-10x-5=-5x+5

-10x+5x=5+5

-5x=10

x=-10/5

x=-2

8 2 8