Ответ:
х=9-у
(9-у)+у2=29
9-у -у2 =29
-у-у2=29-9
-у-у2=20
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Ответ:
х=9-у
(9-у)+у2=29
9-у -у2 =29
-у-у2=29-9
-у-у2=20