Hi,
She returned 9 more dimes than nickels and twenty-one more quarters than dimes
Let x , (x+9), (x+9+21)represent the number of nickels, dimes and quarters reapectively
Question states*** CENTS make sense
5x + 10*(x+9) + 25(x+20) = 1000 CENTS
solve for x in order to determine how many of each there were