Respostas

2013-11-08T18:07:49-02:00
20-80+2x=10
-60+2x=10
2x=10+60
2x=70
x=70/2
x=35
6 4 6
2013-11-08T18:40:53-02:00
2x = 10 - 20 + 80
2x = 70
x= 70p / 2
x = 35
2 5 2