Answer :
First, we divide 48/16=3.
Then, she used 16 cups (4 lbs) of flour for the cakes and 12 cups (3 lbs) of flour for the cupcakes. So, 18-7=11. She has 11 pounds of flour left.
Then, she used 16 cups (4 lbs) of flour for the cakes and 12 cups (3 lbs) of flour for the cupcakes. So, 18-7=11. She has 11 pounds of flour left.