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Math·Algebra·Linear functions

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In the $xy$-plane, line $h$ passes through the point $(0,0)$ and is perpendicular to the line represented by the equation $-3x+y=20$. If line $h$ also passes through the point $(18,t)$, what is the value of $t$?

A

$-54$

B

$-6$

C

$6$

D

$54$