+216 There is a total of 20 quarters stacked in four piles. The first pile has 3 fewer than the second pile. The second pile has 2 more than the third pile. The fourth pile has twice as many as the second pile. How many quarters are in the fourth pile?
+36916 p1 = p2-3
p2
p3 = p2-2
p4 = 2 p2 This is all given in the Question
p2-3 + p2 + p2-2 + 2p2 = 20
5 p2 = 25
p2 = 5
then p4 = 10
