Add c to both sides so you can get 5x by itself, leaving you with 5x=k+c. Then, to get x by itself, we divide both sides by 5. This leaves us with x=(k+c)/5. Hope this helps :)
Find how much interest is earned for one year: $3000 x .015 = $45 Use that answer to find how much interest is earned for 15 years: $45 x 15 years = $675 Add original investment to interest for balance: $3000 + $675 = $3675
