Eliza's backpack weighs 18 7 pounds with her math book in it. Without her math book, her backpack weighs 7 40:18 How much does Eliza's math book weigh? ​

Elizas backpack weighs 18 7 pounds with her math book in it Without her math book her backpack weighs 7 4018 How much does Elizas math book weigh class=