Найдите корень уравнения (x+11)/(x-12)=(x+11)/(x-13)

Question

Найдите корень уравнения (x+11)/(x-12)=(x+11)/(x-13)

Answer 1

X≠12,x≠13
(x+11)(x-12)=(x+11)(x-13)
(x+11)(x-12-x+13)=0
x+11=0
x=-11