A photo is 4 inches wide. It is placed inside a frame with a border that is x inches wide. The total width of the photo and the frame is 7 inches. Write an equation to model the situation. Then solve the equation to find the width of the border.

Answer 1

Let's represent the width of the border as "b."

The total width of the photo and the frame is the sum of the width of the photo and the width of the border: 4 inches + b inches.

According to the problem, the total width of the photo and the frame is 7 inches.

Therefore, we can write the equation:

4 + b = 7

Now, let's solve the equation to find the width of the border (b):

Subtract 4 from both sides of the equation:

b = 7 - 4

b = 3

Therefore, the width of the border is 3 inches.