Given:
Object distance for the first lens, $d_{o1} = 10$ cm (since the object is to the left, it's positive).
Focal length of the first lens, $f_1 = +5$ cm.
We use the thin lens equation:
$\frac{1}{d_{o1}} + \frac{1}{d_{i1}} = \frac{1}{f_1}$
Substitute the given
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