Пошаговое объяснение:
(a + b) *5 + 9a + 3b = 5a + 5b + 9a + 3b = 14a + 8b
при a = 3 ; b = 2
14a + 8b = 14*3 + 8*2 = 42 + 16 = 58
13*(a + b) - 7b + 4a = 13a + 13b - 7b + 4a = 17a + 6b
17a + 6b = 17*3 + 6*2 = 51 + 12 = 63
6*(x + a) - 5a = 6x + 6a - 5a = 6x + a
при a = 3 ; x = 4
6x + a = 6*4 + 3 = 24 + 3 = 27
30x - (5x + 4x) = 30x - 9x = 21x
при x = 4
21x = 21 * 4 = 84
Пошаговое объяснение:
(a + b) *5 + 9a + 3b = 5a + 5b + 9a + 3b = 14a + 8b
при a = 3 ; b = 2
14a + 8b = 14*3 + 8*2 = 42 + 16 = 58
13*(a + b) - 7b + 4a = 13a + 13b - 7b + 4a = 17a + 6b
при a = 3 ; b = 2
17a + 6b = 17*3 + 6*2 = 51 + 12 = 63
6*(x + a) - 5a = 6x + 6a - 5a = 6x + a
при a = 3 ; x = 4
6x + a = 6*4 + 3 = 24 + 3 = 27
30x - (5x + 4x) = 30x - 9x = 21x
при x = 4
21x = 21 * 4 = 84