Question

Упростите выражение. 
(Вложения).

Answer 1

(y-d)/(d+y) + (y-2d)/(2y-6d)=(y-d)/(d+y) + (y-2d)/2(y-2d)=(2y-2d+d+y)/2(d-y)=(3y-d)/(2d-2y) 

Answer 2

(y-d)/(d+y) + (y-2d)/(2y-6d)=
(y-d)/(d+y) + (y-2d)/2(y-2d)=
(2y-2d+d+y)/2(d-y)=3y-d/2(d-y)
Ответ:3y-d/2(d-y)