Respostas

2014-03-20T11:01:44-03:00
2x + 20 =70
2x = 70-20
2x =50
X =25
14 4 14
2014-03-20T11:03:33-03:00
70 - 20 = 50 
50/2 = 25
O angulo e 25
4 3 4