Предмет: Алгебра, автор: gopta

за первый день вася прочел ( дробью) 8 15 страницкниги, за второй ( дробью ) 5 12 страниц книги и за третий день оставшиеся 12 страниц. сколько страниц в этой книге

Ответы

Автор ответа: АннаД

x= $frac{8x}{15} + frac{5x}{12} +12$
180x=96x+75x+2160
9x=2160
x=240

Автор ответа: gopta

поняла

Автор ответа: gopta

а как ты получила 75х

Автор ответа: АннаД

5x*15

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