Resposta:
Oi de novo :-)
2x + y = 3
x + 2y = -1
_________
x = -1 - 2y
2(-1 - 2y) = 3
-2 - 4y = 3
4y = -2 - 3
4y = -5
y = -5/4
x = -1 - 2(-5/4)
x = -1 + 5/2
x = 3/2
S = {3/2 ; -5/4}
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Resposta:
Oi de novo :-)
2x + y = 3
x + 2y = -1
_________
x = -1 - 2y
2(-1 - 2y) = 3
-2 - 4y = 3
4y = -2 - 3
4y = -5
y = -5/4
x = -1 - 2(-5/4)
x = -1 + 5/2
x = 3/2
S = {3/2 ; -5/4}