Question

Решите уровнение
7-(2х-2)*(4х+1)=2х*(5-4х)

Answer 1

7 - (8x^2 + 2x - 8x - 2) = 10x - 8x^2
7 - 8x^2 - 2x + 8x + 2 = 10x - 8x^2
- 8x^2 + 6x + 9 = 10x - 8x^2 
6x - 10x = - 9 
- 4x = - 9
x = 9/4 = 2,25