# Hard SAT Math Question 93 — Video Explanation | 1600.now

Source: https://1600.now/hard/93

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93

Which equation correctly gives $a$ in terms of $b$, $c$, and $d$?  
$\frac{67}{a} = \frac{67}{b} + \frac{67}{c} + \frac{67}{d}$

A

$a = \frac{b + c + d}{abc}$

B

$\frac{bcd}{cd + bd + bc}$

C

$\frac{cd + bd + bc}{bcd}$

D

$\frac{abc}{b + c + d}$