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A converging lens with a focal length of 4.8 cm is to the left of a...

A converging lens with a focal length of 4.8 cm is to the left of a second identical lens. When a feather is placed 13 cm to the left of the first lens, the final image is the same size and orientation as the feather itself.

(A) What is the separation between the lenses? [x=__cm]

**please provide explanation I am very confused on this question**

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