Răspuns :
a = 446
b = a - 207
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b = 446 - 207
b = 239 ; a = 446
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a + b = 239 + 446
a + b = 685
a = 446
b = a - 207
---------------------
b = 446 - 207
b = 239 ; a = 446
---------------------------
a + b = 239 + 446
a + b = 685