Respostas

2014-02-16T14:15:40-03:00
x + y = 7
x - y = 1 ---> x = 1 + y

x + y = 7
1 + y + y = 7
2y = 6
y = 3

x = 1 + y
x = 1 + 3
x = 4

S = (x,y) = (4,3)



1 5 1
Obrigada Adriel
de nada
Certo adriel!

4+3 2 3 = 7 2 3
4 4-3 6 = 4 1 6

Logo --> X = 4 e y + 3