Mashaal Masha
$\dfrac{2}{x-2}+\dfrac{3}{x+5}=\dfrac{rx+t}{(x-2)(x+5)}$

The equation above is true for all $x>2$, where $r$ and $t$ are positive constants. What is the value of $rt$?
Difficulty: Hard
A: 

$-20$

B: 

$15$

C: 

$20$

D: 

$60$

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