Question

решите уравнение (3х+5)(х+7)=(3х+5)(2х-1)

Answer 1

 (3х+5)(х+7) - (3х+5)(2х-1) = 0 
(3x + 5) *(x + 7 - (2x - 1)) = 0 
(3x + 5) * (x + 7 - 2x + 1) = 0 
(3x + 5)* (8 - x) = 0

3x + 5 = 0 
3x = - 5
x = - 5/3 = - 1 ц 2/3 

8 - x = 0 
- x = - 8
x = 8