Respostas

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2014-05-08T23:11:28-03:00
x = 1
4 + y = 2y - x
4 + y = 2y - 1
4 + 1 = y
y = 5
Par ordenado : (x,y) = (1,5)
2 4 2
2014-05-08T23:12:16-03:00
X = 1
4+y = 2y - x
4+y=2y-1
+y-2y=-1-4
-y = -5 (.-1)
y = 5
(1,5)