Предмет: Математика, автор: акерке33

900-(х-724)=4500 пллрооаро

Ответы

Автор ответа: Andrey1977

900-(х-724)=4500
900-х+724=4500
1624-х=4500
-х=4500-1624
-х=2876
х=-2876

проверим
900-(-2876-724)=4500
900-(-3600)=4500
900+3600=4500
4500=4500

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