Respostas

2013-09-09T21:39:58-03:00
3(x+1) - 2(x-1) = -(x+5)
3x+3 -2x +2 = -x -5 
x = -x-5
2x = -5
x = -5/2
x = -2,5
2013-09-09T21:40:34-03:00
3x + 3 -2x + 2 = -x -5
3x - 2x +x = -5 -3 - 2
2x = -10
x = -5