Question

1. faith gave ashley 11 sets of earrings and was left with 7 pairs. write a subtraction equation, then determine the total number of earring pairs faith originally had.
2. brian bought a book that costs $15. brian gave the cashier $17. write a subtraction equation, then determine how much brian overspent on his book.

Explanation:

Problem 9:

Step1: Define variables

Let \( x \) be the original number of earring pairs Faith had. She gave 11 sets to Ashley and was left with 7 pairs. So the subtraction equation is \( x - 11 = 7 \).

Step2: Solve for \( x \)

To find \( x \), we add 11 to both sides of the equation: \( x = 7 + 11 \).

Step3: Calculate the result

\( 7 + 11 = 18 \). So Faith originally had 18 pairs of earrings.

Step1: Define variables

Let \( y \) be the amount Brian overspent. He gave the cashier $17 for a $15 book. The subtraction equation is \( 17 - 15 = y \).

Step2: Calculate the result

\( 17 - 15 = 2 \). So Brian overspent $2.

Answer:

The subtraction equation is \( x - 11 = 7 \), and Faith originally had 18 pairs of earrings.

Problem 10: