Respostas

2014-02-26T20:41:24-03:00
7x + 4x = 5 + 2
11 x = 7
X = 7/11
X = 0,63
1 1 1
2014-02-26T22:23:22-03:00
7X-2=4X=5
7X-4X=2=5
11X=7
X=7SOBRE11
1 2 1