Respuesta :

First you have to distribute 3 to 7 and -7n which is 21-21n-7=98
Then you have to do 21-7 which is 14
Now it’s -21n+14=98
So then you subtract 14 to 98 which is 84. Now the equation is -21n=84
Now divide -21 to 84
n = - 4