Question

(2x+5)(x-4)=x (2x+7)​

Answer 1

$(2x + 5)(x - 4) = x(2x + 7) \\ 2x {}^{2} - 8x + 5x - 20 = 2x {}^{2} + 7x \\ - 8x + 5x - 20 = 7x \\ - 3x - 20 = 7x \\ - 3x = 7x + 20 \\ - 3x - 7x = 20 \\ - 10x = 20 \\ x = - 2$

Пошаговое объяснение:

Ответ: -2