Dave has d books, which is 3 times as many as Jercy and 1/2 as many as Pavi. How many books do the three of them have altogether, in terms of d?	Choose the correct choice:
A) 5/6*d B) 7/3*d C) 9/2*d D) 7/2*d E) 10/3*d
Although we could plug in a real value for d, the problem can be just as easily solved by setting up equations. However, let’s start by defining some variables. Since we are given that David has d books, we can use variable d to represent how many books David has.   number of books Dave has = d   number of books Jercy has = j   number of books Pavi has = p   We are given that Dave has 3 times as many books as Jercy. We can now express this in an equation.   d = 3j   d/3 = j   We are also given that Dave has ½ as many books as Pavi. We can also express this in an equation.   d = (1/2)p   2d = p   Notice that we immediately solved forj in terms of d and p in terms of d. Getting j and p in terms of d is useful when setting up our final expression. We need to determine, in terms of d, the sum of the number of books for David, Jeff, and Paula. Thus, we have:   d + d/3 + 2d   Getting a common denominator of 3, we have:   3d/3 + d/3 + 6d/3 = 10d/3 = 10/3*d   The answer is 10/3*d
<result>E</result>
Dave has d books, which is 3 times as many as Jercy and 1/2 as many as Pavi. How many books do the three of them have altogether, in terms of d?