13. Реши: 2.(х+5) + 4 = 24; 3.(x + 2) + 6 = 30. Ответ:

Решение:

Решаем каждое уравнение отдельно:

1. \( 2(x + 5) + 4 = 24 \)
   \( 2(x + 5) = 24 - 4 \)
   \( 2(x + 5) = 20 \)
   \( x + 5 = \frac{20}{2} \)
   \( x + 5 = 10 \)
   \( x = 10 - 5 \)
   \( x = 5 \)
2. \( 3(x + 2) + 6 = 30 \)
   \( 3(x + 2) = 30 - 6 \)
   \( 3(x + 2) = 24 \)
   \( x + 2 = \frac{24}{3} \)
   \( x + 2 = 8 \)
   \( x = 8 - 2 \)
   \( x = 6 \)

Ответ: x = 5, x = 6.