Question 110213
A recreational softball team paid a league entry fee of $825. The cost was covered by equal contributions from each memeber on the team. If there were four more team members, each person could contibute $20 less. How many memebers does the team have? 
i tried to write an equation... i made "x" be the money the players were contributing and "p" be the number of players 
since it said the fee was split evenly, i put 825/x = p.
also, i had (p+4) = 825/(x-20) because if there were four more players they would have to pay $20 less than before. After that, i could understand how you were able to figure out how many members the team had. Could you help me please? 
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You have 825/x as the average cost per member at the start.
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You have 825/(x+4) as the average cost if there were 4 more members.
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EQUATION:
Old Average - New average = $20
825/x - 825/(x+4) = 20
4*825 = 20x(x+4)
825 = 5x(x+4)
165 = x(x+4)
x^2+4x-165 = 0
(x+15)(x-11)=0
x = 11 (original number of members)
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Cheers,
StanH.