Предмет: Математика, автор: karina66449

Помогите пожалуйста решить.... Заранее большое СПАСИБО!!!!
ЗАДАЧА:
Одна сторона а сторона треугольника в 7 раз меньше второй и на 66 см меньше третьей. Найдите стороны треугольника если периметр равен 174 см.

Ответы

Автор ответа: ninjazhanibek

пусть х первая сторона

тогда вторая 7х и третья х+66

решаем

х+7х+х+66=174

9х=108

х=12 см первая

вторая 12×7=84 см и третья 12+66=78 см

Автор ответа: vika6497

х-первая сторона

7х-вторая сторона

66+х-третья сторона

составим уравнение:

х+7х+66+х=174

9х=174-66

9х=108

х=108:9

х=12 см -первая сторона

12×7=84 см -вторая сторона

12+66=78см-третья сторона

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