#### Answer

$d=\frac{l}{f}$

#### Work Step by Step

Multiply $d$ to both sides of the equation:
$d \cdot f=d \cdot \frac{l}{d}
\\df = l$
Divide $f$ to both sides of the equation:
$\frac{df}{f}=\frac{l}{f}
\\d=\frac{l}{f}$

Published by
Pearson

ISBN 10:
0-32184-874-8

ISBN 13:
978-0-32184-874-1

$d=\frac{l}{f}$

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