Respostas

2013-11-28T22:51:20-02:00
X = 10 + y

2(10+y) + 5y = 76
20 + 2y + 5y = 76
7y = 76 - 20
7y = 56
y = 8

x = 10 + 8
x = 18

(18, 8)
2 5 2