Question 428656
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Hi
cashier has 53 bills in all
Let x and (53-x)represent the number of twenty and five dollar bills respectively
Question states***
  20x + 5(53-x) = $820
Solving for x
       15x = 555
        x = 37 twenty dollar bills and 16 five dollar bills 
CHECKING our Answer***
    $740 + $80 = $820