Question

Помогите решить СРОЧНО!!!

Answer 1

................=$frac{3x}{(2-x)(3- frac{3x}{2-x}) } = frac{3x}{(2-x)( frac{3(2-x)-3x}{2-x}) } = frac{3x}{6-3x-3x} = frac{3x}{6-6x} = frac{3x}{6(1-x)}= frac{x}{2(1-x)}$

при  х=5/7
$frac{ frac{5}{7} }{2(1- frac{5}{7}) }= frac{5}{2*7* frac{2}{7} } = frac{5}{4}= 1frac{1}{4}$