Respostas

2014-07-03T19:40:11-03:00


x-x+2x=-1-3

2x=-4

x=-4 dividido por 2=====-2

1 5 1
2014-07-03T19:41:09-03:00
X + 2X + 1 + 3 = X
3X + 4 = X
3X - X = - 4
2X = -4
X= -4/2
X= -2
1 5 1