Question

i need help to write and solve equationsToni can carry up to 18 lb in her backpack. Her lunch weighs 1 lb, and her books (b) weights 3 lb each. How many books can she carry in her backpack?

Answer 1

Calling b to the number of books, the weight of Toni's backpack is:

1 + 3b

Toni can carry up to 18 lb, then:

1 + 3b ≤ 18

Solving for b:

3b ≤ 18 - 1

3b ≤ 17

b ≤ 17/3

b ≤ 5.67

Then, she can carry 5 books