Question

$frac{x+8}{5x+7}= frac{x+8}{7x+5}$ Решите уравнение

Answer 1

((x+8)*(7x+5)-(x+8)(5x+7))=0      x≠-7/5 U x≠-5/7
(x+8)(7x+5-5x-7)=0
(x+8)(3x-2)=0
x=-8 U x=2/3