Question

(2x+3)*(x-7)=(x+3)*(2x+1)

Answer 1

( 2х + 3 ) • ( х - 7 ) = ( х + 3 ) • ( 2х + 1 )
2х² - 14х + 3х - 21 = 2х² + х + 6х + 3
- 14х + 3х - 21 = х + 6х + 3
- 11х - 21 = 7х + 3
- 11х - 7х = 3 + 21
- 18х = 24
Ответ: (на картинке).