Предмет: Математика, автор: Удача007

Дам 30 баллов!!!!!!!
В первый час автобус прошёл 40% всего пути, во второй час 1/3 пути, а в третий остальные 28 километров. Какое расстояние автобус прошёл за три часа?

Ответы

Автор ответа: Silеncе
0
х весь путь
0,4х в первый час

0,4х+1/3х+28=х
2/5х+1/3х+28=х
11х+420=15х
11х-15х=-420
-4х=-420
х=105 км весь путь



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