Sally sold a decorated flowers that cost the same amount each plus a dozen roses for $28. All together she sold $73 in flowers. How much was each decorated flower?

To begin you must subtract the cost of the roses from the total cost of the flowers sold so $73-$28. Then divide the remainder by the number of decorated flowers she sold to get the cost per each decorated flower. I do not see in your question the number of decorated flowers she sold. I see "a" so perhaps she sold one?