Упрости выражения. Найди значения при а = 3, b = 2, x = 4. (a + b) * 5 + 9a + 3b 13 * (a + b) - 7b + 4a 6 * (x + a) - 5a 30x - (5x + 4x)

1. (a + b) ⋅ 5 + 9a + 3b

Подставляем значения a = 3 и b = 2:

(3 + 2) ⋅ 5 + 9 ⋅ 3 + 3 ⋅ 2 = 5 ⋅ 5 + 27 + 6 = 25 + 27 + 6 = 58

2. 13 ⋅ (a + b) - 7b + 4a

Подставляем значения a = 3 и b = 2:

13 ⋅ (3 + 2) - 7 ⋅ 2 + 4 ⋅ 3 = 13 ⋅ 5 - 14 + 12 = 65 - 14 + 12 = 63

3. 6 ⋅ (x + a) - 5a

Подставляем значения x = 4 и a = 3:

6 ⋅ (4 + 3) - 5 ⋅ 3 = 6 ⋅ 7 - 15 = 42 - 15 = 27

4. 30x - (5x + 4x)

Подставляем значение x = 4:

30 ⋅ 4 - (5 ⋅ 4 + 4 ⋅ 4) = 120 - (20 + 16) = 120 - 36 = 84