Предмет: Математика, автор: mr17082003

Составьте выражение для решения задачи :
Найдите периметр прямоугольника, ширина которого x см , а длина в 3 раза больше . Найдите значение выражения при x =18

Ответы

Автор ответа: BrendedX

4

(18+18*3)*2=144(см)периметр

Автор ответа: mandarinka0406

5

(х+3х) *2=2х+6х
Если х=18, то 2х+6х=18*2+18*6=36+108=144 (см)

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