$x + y + z = 2$
$x^2 − y^2 − z^2 = 2$
$x − 3y^2 + z = 0$
Canadian Mathematical Olympiad Qualification Repechage 2009
Algebra, Geometry, International Mathematical Olympiads, Recreational Mathematics, Math contests, Puzzles, Brainteasers, Number Theory, Combinatorics, Logic, Paradox
(x, y, z) = (2, -1, 1) ή (19/12, 2/3, -1/4)
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