Respostas

2013-11-30T10:34:14-02:00
3(x+1)-2(x-1)=-(x+5)
3x+3-2x+2 = -x-5
x+5 = -x-5
2x = -10
x = -5
2013-11-30T10:34:25-02:00
3x + 3 - 2x + 2 = - x - 5
3x -2x +x = -5 -2 -3
4x - 2x = -10
2x = - 10
x = -10/2
x = - 5