Bella bought b boxes of cookies to bring to a party. She decides to keep two boxes. Each box contains 18 cookies. She brings 90 cookies to the party. Which equation can be used to find the number of boxes, b, Bella bought? How many boxes did she buy?

Question

Responses

18b−2=90; b=5
18b−2=90; b=5

2b−18=90; b=54
2b−18=90; b=54

18b−36=90; b=7
18b−36=90; b=7

18b−36=90; b=6

Answer 1

The correct equation that can be used to find the number of boxes, b, Bella bought is 18b - 2 = 90.

To solve the equation, you would add 2 to both sides to isolate the 18b term:

18b - 2 + 2 = 90 + 2

Simplifying, you get:

18b = 92

Finally, divide both sides by 18 to solve for b:

b = 5

Therefore, Bella bought 5 boxes of cookies.