Question

8сверху x снизу =x-7

Answer 1

Объяснение:

$\frac{8}{x} = x - 7 \\ 8 = (x - 7)x \\ 8 - (x - 7)x = 0 \\ 8 - ( {x}^{2} - 7x) = 0 \\ 8 - {x}^{2} \times 7x = 0 \\ {x}^{2} - 7x - 8 = 0 \\ {x}^{2} + x - 8x - 8 = \ 0 \\ x \times (x + 1) - 8(x + 1) = 0 \\ x + 1 = 0 \\ x - 8 = 0 \\ x = - 1 \\ x = 8$