Предмет: Математика, автор: natalakolodenko5

Із двох сіл,відстань між якими становить 21 км,одночасно назустріч один одному вийшли два приятелі.Один із них ішов зі швидкістю 3 км/год,другий -зі швидкістю 4 км/год.Через скільки годин вони зустрінуться?Склади обернену задачу

Ответы

Автор ответа: Аноним

$3x + 4x = 21 \\ 7x = 21 \\ x = 3$

3 км/год

Задача:

З двох сіл назустріч один одному йшли два приятелі і зустрілися через 3 години. Один із них ішов зі швидкістю 3 км/год, а інший - 4 км/год. Яка відстань між селами?

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