Question

срочно решите уравнение плз

Answer 1

$frac{700}{x} - frac{700}{x - 10} = 4 \ 700(x - 10) - 700x = 4x(x - 10) \ 700x - 7000 - 700x = {4x}^{2} - 40x \ { - 4x}^{2} + 40x - 7000 = 0 \ {x}^{2} - 10x + 1750 = 0 \ d = { - 10}^{2} - 4 times 1 times 1750 = - 6900 \ 0 > - 6900$
нет ответа.