Resposta:
a) 3x - 2y = 5
b) x + 4y = 2
c) 7x + y = 11
d) 5x - y = -2
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Resposta:
a) 3x - 2y = 5
b) x + 4y = 2
c) 7x + y = 11
d) 5x - y = -2