Предмет: Математика, автор: Дарья040913

Длина прямоугольника на 3 см больше ширины.Его переметр 22см.Найдите длину и ширину прямоугольника

Ответы

Автор ответа: Аноним

Пусть x - длина, тогда x + 3 - ширина. Составим уравнение:
(x + x + 3) * 2 = 22;
2x + 3 = 11;
2x = 8;
x = 4 (см) - длина, значит:
4 + 3 = 7 (см) - ширина;
Ответ: 4 см; 7 см.

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