11p svp aidez moi c'est important c'est le 30

(2x+3) (x-5) = 2x(x-2)
2x² -10x +3x - 15 = 2x² -4x
2x² -7x - 15 = 2x² - 4x
2x² - 2x² -7x - 15 = 2x² - 2x² -4x
-7x -15 = -4x
-7x -15 +7x = -4x +7x
-15 = 3x

x = -15/3
x= -5