В этом видео решается задача на соотношение количеств. Это видео - русский перевод лекции "Ratio problem with basic algebra (new HD)" Академии Хана (https://www.khanacademy.org/math/algebra/rational-expressions/ratios_algebra/v/ratio-problem-with-basic-algebra--new-hd) Перевод Веры Богуславской. Наша страница на Facebook - http://www.facebook.com/KhanAcademyRussian This video is a Russian dubbed version of Khan Academy "Ratio problem with basic algebra (new HD)". This video is a translation of a Khan Academy lecture available at https://www.khanacademy.org/math/algebra/rational-expressions/ratios_algebra/v/ratio-problem-with-basic-algebra--new-hd The translarion was made by Vera Boguslavskaya. Join us on https://www.facebook.com/KhanAcademyRussian