SAT Math Practice Question #29860 - SATify | SATify

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SAT Math Practice Question #29860 - SATify | SATify

#29860

equations

algebra

hard

90 sec

Given the equation $\frac{20}{x} - \frac{4}{y} = \frac{5}{z}$ , where $x, y, z$ are positive variables, which of the following expressions is equivalent to $x$ ?

A.

$\frac{20 yz}{5 y + 4 z}$

B.

$\frac{5 y + 4 z}{20 yz}$

C.

$\frac{20 yz}{4 z - 5 y}$

D.

$\frac{20 yz}{5 y - 4 z}$