Tonight can carry up to 18 lb in her backpack. Her lunch weighs 1 lb, and her books (b) weigh 3 lb each. How many books can she carry in her backpack

Respuesta :

5 books can be carried along with her lunch.
I am assuming she carries her lunch in her backpack...
1 + 3b = 18
3b = 18 - 1
3b = 17
b = 17/3
b = 5 2/3......so she can carry 5 books...if she didn't carry her lunch, she could carry 6 books..lol