Решите систему способом замены переменной
[tex] \left \{ {{ \frac{1}{x+y} }- \frac{5}{x-y} =2 \atop { \frac{3}{x+y} } +\frac{5}{x-y} =2} \right. [/tex]
[tex] \left \{ {{ \frac{1}{x+y} }- \frac{5}{x-y} =2 \atop { \frac{3}{x+y} } +\frac{5}{x-y} =2} \right. [/tex]
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