Пошаговое объяснение:
(10x+9)x-(5x-1)(2x+3)=8
10x² + 9x - 10x² - 15x + 2x + 3 = 8
-4x + 3 = 8
-4x = 8 - 3
-4x = 5
x = -5 : 4
x = -1,25
(3x+1)(8x-7)-(4x-1)(6x-3)=15
24x² - 21x + 8x - 7 - 24x² + 12x + 6x - 3 = 15
5x - 10 = 15
5x = 15 + 10
5x = 25
x = 25 : 5
x = 5
Пошаговое объяснение:
(10x+9)x-(5x-1)(2x+3)=8
10x² + 9x - 10x² - 15x + 2x + 3 = 8
-4x + 3 = 8
-4x = 8-3
-4x = 5
x = -5 : 4
x = -1,25
