Respuesta :

9n-2=7n+50
add 2 to both sides 
   9n=7n+52
subtract 7n from both sides
   2n=52
divide both sides by 2
   n=26
2n - 2 = 50 <--- subtract 7n from 9n
2n = 52  <---- add 2 to 50 

n = 26 <----- divide 52 by 2 

n = 26 <----- your answer