1. Решите систему уравнений методом замены переменной:
<span> {xy + 2*(x - y) = 10</span>
<span> <span>{5xy - 3*(x - y) = 11</span></span>
<span><span>2. Решите систему уравнений:</span></span>
<span><span> <span>{x² - y² = -32</span></span></span>
<span><span><span> <span>{x + y = 16</span></span></span></span>
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