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Moderate

Solving for $y+z$

GMAT-F4UKTA

$60\%$ of $ z$ is equal to $20\%$ of $y$. $y$ is equal to $200\%$ of $x$.

If $x$ equals $90$, what is $50\%$ of $(y+z)$?

A

$30$

B

$36$

C

$60$

D

$120$

E

$144$