Ответ:
x + y = 14
x + 0 = 14
x = 14
x - y = 8
-y = 8 - x
y = -8 + x
y = -8
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Ответ:
x + y = 14
x + 0 = 14
x = 14
x - y = 8
-y = 8 - x
y = -8 + x
y = -8