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Geometry

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Parallelograms and Their Angles

GEOM-VVAE1G

In parallelogram CUBS, $m\angle SBL = 20x + 3$, $m\angle UCL = 15 +14x$, and $m\angle ULB = 17{ x }^{ 2 }$. Find $m\angle USB$.

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A

$2°$

B

$25°$

C

$43°$

D

$68°$

E

$112°$