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Système à 3 équations : \begincases a + b + c = 10 }, {a - b + c = 4 }, {a + b - c = 6 \endcases
Système à 3 équations : \begincases a + b + c = 10 }, {a - b + c = 4 }, {a + b - c = 6 \endcases
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