Предмет: Математика, автор: Оксана2502

На одній ділянці було втричі більше саджанців, ніж на іншій. Якщо з першої ділянки викопати 30 саджанців, а на другу досадити ще 10 саджанців, то на обох ділянках саджанців стане порівну. Скільки саджанців було на кожній ділянці спочатку?

Ответы

Автор ответа: kirichekov

х саженцев на 2-й делянке
3х саженцев на 1-й делянке
3х-30 саженцев станет на 1-й
х+10 саженцев станет на 2-й
уравнение:
3х-30=х+10
2х=40, х=20
20*3=60
ответ: на перво делянке 60 саженце
на 2-й делянке 20 саженцев.

системой:
х - на 1-й
у - на 2-й

{x=3y {x=3y
x-30=y+10 3y-30=y+10

2y=40, y=20
{x=60
y=20

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