Предмет: Математика, автор: maximmaksimaks

23-??+8=11 какая цифра будет в середине?!

красавчик4: 20

Ответы

Автор ответа: nika8may

23-11=12
12+8=20 неизвесная цифра
23-20+8=11
23-20=3
3+8=11 ответ

Автор ответа: julyap

$23-??+8=11\\23-x+8=11\\23-x=11-8\\23-x=3\\x=23-3\\x=20\\\\23-20+8=3+8=11$

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