Answer :
subtract 2.2 from both sides leaving -2n on the left and 10 on the right. from there you want to get "n" by itself so you divide both sides by -2n and you get n=-5
2.2-2n=12.2
-2.2 -2.2
-2n = 10
/-2 /-2
n=-5
2.2-2n=12.2
-2.2 -2.2
-2n = 10
/-2 /-2
n=-5