I'm thinking n would be -2 but when I add it stops at 11 and when I put -3 in its place it says 14 so I'm guessing maybe -2.4
See the attached picture for the solution:
Answer:
9.4
Step-by-step explanation:
1+3+15+11+17=47
47/5=9.4
Multiply both sides by three to get 2x=30
Then divide both sides by 2 to get x=15