Помогите 6,75x=2/1/4x-9

Question

Помогите 6,75x=2/1/4x-9

Answer 1

6,75x=(2*(4x-9))/1 6,75x=8x-18 -1,25x=-18 X=14,4

Answer 2

Начнем с члена
2 / (1/4*х) = (2/1)*(4*х) =8*х
6,75*х = 8*х - 9 
8*х- 6 3/4*х = 9 или (32-27)/4*х = 5/4*х =9
х =9*4/5 = 36/5  = 7 1/5
Ответ: х = 7 1/5