Question 307058
According to the kellybluebook.com, the average value of a new car after one year is seven-tenths of its original price. Write an equation representing the price(P)in dollars of a one-year old car in terms of its original price(X). 
.
Let x = original price
then price after one year:
P = x - (7/10)x
P = x - .7x
P = x(1-.7)
P = .3x