Question

3x/(3-x) + 9/(x-3) = x Помогите решить уравнение

Answer 1

$frac{3x}{3-x}+ frac{9}{x-3}= frac{3x}{-(x-3)} + frac{9}{x-3}=- frac{3x}{x-3}+ frac{9}{x-3}= frac{-3x+9}{x-3} = frac{-3(x-3)}{x-3}= \ =-3$