Ответ:
x = 8; y = -1
Объяснение:
x + y = 7
x - y = 9
x + y + (x - y) = 7 + 9
x + y + x - y = 16
2x = 16
x = 8
y = 7 - 8 = -1
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Ответ:
x = 8; y = -1
Объяснение:
x + y = 7
x - y = 9
x + y + (x - y) = 7 + 9
x + y + x - y = 16
2x = 16
x = 8
y = 7 - 8 = -1