Respostas

2013-01-31T21:18:47-02:00

(x-5)=3(x+1) 

x-5=3.x+3.1

x-5=3x+3

x-3x=3+5

-2x=8

2x=-8.(-1)

x=-8:2 

R : x=-4 

1 5 1