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Math·Advanced Math·Equivalent expressions

easy

$$y=\frac{4z}{x+7}$$

The given equation relates the positive numbers $x$, $y$, and $z$. Which equation correctly expresses $z$ in terms of $x$ and $y$?

A

$z=\frac{xy}{4}$

B

$z=\frac{x+7}{4y}$

C

$z=\frac{4y}{x+7}$

D

$z=\frac{(x+7)y}{4}$