Question

1/1 - x-1= x/1- x+2/3 
ALGUÉM ??

Answer 1

$\frac{1}{1} -x-1= \frac{x}{1} -x+ \frac{2}{3} \\ 1-x-1= x-x+ \frac{2}{3} \\ -x= \frac{2}{3} \\ \boxed {x=- \frac{2}{3} }$