Question

 5x - 2y          при x =26,3   y=39,8
5x + 2y

Answer 1

$frac{5x-2y}{5x+2y} = frac{5cdot 23,3-2cdot39,8}{5cdot 23,3+2cdot39}= frac{36,9}{196,1}= frac{3690}{1961}=1 frac{1729}{1961}$