Respuesta:
a = 7 - b,
b (7 - b) = 2
b² - 7b = 2
b² = 7b + 2
b = 7 - a
a (7 - a) = 2
a² - 7a = 2
a² ² 7a + 2
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Respuesta:
a = 7 - b,
b (7 - b) = 2
b² - 7b = 2
b² = 7b + 2
b = 7 - a
a (7 - a) = 2
a² - 7a = 2
a² ² 7a + 2