Answer: 
Step-by-step explanation:
Given
Marcos purchased a sailboat for 
Each year the boat will decrease in value by 
After 1 year it is

after another year it becomes

After
years it is


Add all those numbers and divide by 6 will get you 78
The answer to this question is p+3
A+b=45
a>b
a=b+7
→
b+7+b=45
2b+7=45
2b=38
b=19
a=19+7=26