Ответ:
Пошаговое объяснение:
5*(2x-4) - 3*(4x+1) = 6*15
10x - 20 - 12x - 3 = 90
-2x - 23 = 90
-2x = 90+23
-2x = 113
x = 113:(-2)
x = -56,5
7x*6 - 2(3x - 2) = 3*(4x+1)
42x - 6x + 4 = 12x + 3
36x + 4 = 12x + 3
36x - 12x = 3 - 4
24x = -1
x = -1:24
x = -1/24