-2*(3,1х-1)+3*(1,2х+1)=-14,5

-2*(3,1х-1)+3*(1,2х+1)=-14,5
- Предмет:
  Математика
- Автор:
  oriol
- 6 лет назад

Ответы 1

-2 * (3,1х - 1) + 3 * (1,2х + 1) = -14,5
-6,2х + 2 + 3,6х + 3 = -14,5
-6,2х + 3,6х = -14,5 - 2 - 3
-2,6х = -19,5
х = -19,5 : (-2,6)
х = 7,5
Проверка: -2 * (3,1*7,5 - 1) + 3 * (1,2*7,5 + 1) = -14,5
-2 * 22,25 + 3 * 10 = -14,5
-44,5 + 30 = -14,5
-14,5 = -14,5
- Автор:
  pedroghd0
- 6 лет назад
- 0
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-2(3,1х-1)+3(1,2х+1)=-14,5

Ответы 1

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