x + y = 26 и x^2 - y^2 = 104,
x + y = 26 и (x - y) * (x + y) = 104
x + y = 26 и 26x - 26y = 104,
x = 26 - y и x - y = 4,
x = 26 - y и 26 - 2y = 4,
x = 26 - y и -2y = - 22,
y = 11 и x = 15
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x + y = 26 и x^2 - y^2 = 104,
x + y = 26 и (x - y) * (x + y) = 104
x + y = 26 и 26x - 26y = 104,
x = 26 - y и x - y = 4,
x = 26 - y и 26 - 2y = 4,
x = 26 - y и -2y = - 22,
y = 11 и x = 15