Предмет: Алгебра, автор: irka424

помогите вот фотка номер 3

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Автор ответа: Аноним
0
СВ=х
АС=2х
всего-21см
2х+х=21
3х=21
х=7
СВ=7см
АС=7*2=14см
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Вот текст:
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d
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