9a + 17a - 30a + 4a = (9 + 17 - 30 + 4)a = 0a = 0
-5x + 11x + 47x - 31x = (-5 + 11 + 47 - 31)x = 22x = 22x
15a - a + b - 6b = (15 - 1)a + (1 - 6)b = 14a - 5b = 14a - 5b
-12c - 12a + 7a + 6c = (-12 + 6)c + (-12 + 7)a = -6c - 5a = -6c - 5a
1.7x - 1.2y - 1.7x + 0.5y = (1.7 - 1.7)x + (-1.2 + 0.5)y = 0x - 0.7y = -0.7y
2a + (3a - 8b) = 2a + 3a - 8b = (2 + 3)a - 8b = 5a - 8b = 5a - 8b
-5b - (8a - 8.5b) = -5b - 8a + 8.5b = -8a + (-5 + 8.5)b = -8a + 3.5b = -8a + 3.5b
-(3c + 5x) - (9c - 6x) = -3c - 5x - 9c + 6x = (-3 - 9)c + (-5 + 6)x = -12c + x = -12c + x
7(5a + 8) - 11a = 35a + 56 - 11a = (35 - 11)a + 56 = 24a + 56 = 24a + 56
13a - 8(7a - 1) = 13a - 56a + 8 = (13 - 56)a + 8 = -43a + 8 = -43a + 8
-2(2p - 1) + 4 = -4p + 2 + 4 = -4p + 6 = -4p + 6
Сначала упростим выражение:
0.6(4x - 14) - 0.4(5x - 1) = 2.4x - 8.4 - 2x + 0.4 = (2.4 - 2)x - 8.4 + 0.4 = 0.4x - 8
Теперь найдем значение выражения при x = 4\(\frac{1}{6}\) = \(\frac{25}{6}\):
0.4 * \(\frac{25}{6}\) - 8 = \(\frac{0.4 * 25}{6}\) - 8 = \(\frac{10}{6}\) - 8 = \(\frac{5}{3}\) - 8 = \(\frac{5}{3}\) - \(\frac{24}{3}\) = -\(\frac{19}{3}\) = -6\(\frac{1}{3}\)
Ответ: -6\(\frac{1}{3}\)