Respostas

2013-10-04T09:55:32-03:00
2x = 26 - 3y
x = 26/2 - 3/2y
x= 13 - 3/2y
39 - 9/2y + 2y = 1
-5/2y = 1 - 39
y = 76/5

x = 13 - 3/2 . 76/5
x = -98/10
1 1 1