Question

solve the problems by using equations. then check the answers. chocolate chip cookies are sold in boxes of 6 and plain cookies are sold in boxes of 8. if nancy buys 3 boxes of plain cookies and a few boxes of chocolate chip cookies to have 144 cookies in total, how many boxes of chocolate chip cookies does she buy? check

Explanation:

Step1: Define variable

Let \( x \) be the number of boxes of chocolate chip cookies.

Step2: Calculate plain cookies

Plain cookies per box: 8, boxes: 3. So plain cookies: \( 8\times3 = 24 \)

Step3: Calculate chocolate chip cookies

Chocolate chip per box: 6, boxes: \( x \). So chocolate chip cookies: \( 6x \)

Step4: Set up equation

Total cookies: plain + chocolate = 144. So \( 24 + 6x = 144 \)

Step5: Solve for \( x \)

Subtract 24: \( 6x = 144 - 24 = 120 \)
Divide by 6: \( x = \frac{120}{6} = 20 \)

Answer:

20