Respostas

2014-07-02T01:55:39-03:00
17x - 7x = x +18
10x = x + 18
10x - x = 18
9x = 18
x = 18/9
x = 2
2 4 2
2014-07-02T01:55:57-03:00
17x-7x=x+18 
10x = x + 18
10x - x = 18
9x = 18
x = 18/9
x = 2
2 5 2