Ответ:
63•у=63•3•0
63•у=0
у=0:63
у=0
Проверка:63•0=63•3•0
80*а=1000-680
80*а=320
а=320:80
а=4
80*4=320
80*4=1000-680
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Ответ:
63•у=63•3•0
63•у=0
у=0:63
у=0
Проверка:63•0=63•3•0
80*а=1000-680
80*а=320
а=320:80
а=4
80*4=320
80*4=1000-680
80a=320
a=320/80
a=4