Respostas

2013-10-14T00:12:31-03:00
7x-6=50
7x=50+6
7x=56
x=56/7
x=8
1 5 1
2013-10-14T00:47:20-03:00
7x-6=50
7x=-6-50
7x = -56
x = -56 divido por -6
x = 8