Respostas

2013-09-11T17:55:44-03:00
X + x + 7 = 37
2x + 7 = 37
2x = 37 - 7
2x = 30
x = 30/2
x = 15
2 5 2
2013-09-11T17:56:00-03:00
X + x + x + 7 = 37
3x = 37 - 7
3x = 30
x = 10
1 1 1