Question

Решите уравнение x+3,4/10x-9=x+3,4/9x-10

Answer 1

(x+3,4)/(10x-9)=(x+3,4)/(9x-10)
x≠0,9  x≠1 1/9
(x+3,4)(9x-10)-(x+3,4)(10x-9)=0
(x+3,4)(9x-10-10x+9)=0
(x+3,4)(-x-1)=0
x+3,4=0
x=-3,4
-x-1=0
x=-1