Answer:
If he taped the edges of the photograph, then the width is 5 inches.
Explanation:
The perimeter of a rectangular photo is composed of 2 lengths and 2 widths
2l + 2w = 24in
l = 7in
2*7in + 2w = 24in
14in + 2w = 24in
2w = 10in
w = 5in
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