Answer:
The regular price of the car is $13,000.
Explanation:
i) let the price of the van Andy and Diane want to buy be $x.
ii) they get $5,500 for their present car
iii) they also make a down payment of $2,300. 
iv) therefore $x = $0.4x + $5,500 + $2,300 
 therefore $0.6x = $7,800
 therefore $x = $
 = $13,000
 = $13,000
The regular price of the car is $13,000.