SOLUTION: Anyone help me? Katie has $880 in $5 bills and $20 bills. If she has four more twenties than fives, how many $20 bills does she have?

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Question 833549: Anyone help me?
Katie has $880 in $5 bills and $20 bills. If she has four more twenties than fives, how many $20 bills does she have?
Answer by KMST(5328) About Me  (Show Source):
You can put this solution on YOUR website!
x= number of $5 bills Katie has
x%2B4= number of $20 bills Katie has
5%2Ax= value, in $, of x $5 bills
20%2A%28x%2B4%29=+value%2C+in+%24%2C+of+%7B%7B%7Bx%2B4 $20 bills
So, our equation is
5%2Ax%2B20%2A%28x%2B4%29=880

Solving:
5%2Ax%2B20%2A%28x%2B4%29=880
5x%2B20x%2B20%2A4=880
25x%2B80=880
25x=880-80
25x=800
x=800%2F25
x=32
x%2B4=32%2B4%29
x%2B4=highlight%2836%29
Katie has highlight%2836%29 $20 bills.