Предмет: Алгебра, автор: klimovsavelij383

одна сторона треугольника в 3 раза меньше второй и на 14мм меньше третьей. найдите стороны треугольника если периметр равен 69мм?​

Ответы

Автор ответа: jcjcjcjcjcjc
2

Ответ:

x+3x+(x+14)=69

x+3x+x+14=69

5x+14=69

5x=69-14

5x=55

x=55/5

x=11

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