Respostas

2013-11-06T21:29:51-02:00
2x + 4 = 40
2x = 40-4
2x = 36
x = 36/2
x = 18
2013-11-06T21:30:39-02:00
2x+4=40
2x=40-4
2x=36
X=36/2
X= 18