Respostas

2014-05-06T21:27:57-03:00
5+6y-2=7y+6
6y-7y=6-5+2
-y= 3 (-1)
y= -3
2014-05-06T21:34:04-03:00
5 + 2(3y - 1) = 7y + 6
5 + 6y - 2 = 7y + 6
5 - 2 - 6 = 7y - 6y
3 - 6 = y
y = -3