Respuesta :

katelynicoley
EF & DG are parallel lines and that means they’re congruent (the same). You set like EF=DG and solve from there.
x-1=2x-10
-x -x
-1=x-10
+10 +10

9=x.
Plug back into EF (x-1)
9-1
EF= 9