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Math·Advanced Math·Nonlinear equations in one variable and systems of equations in two variables

hard

$$(x-k{)}^2=(k-4a)(x-k)$$
In the given equation, $a$ and $k$ are constants, where $k>4a$. The sum of the solutions to the equation is $3k+33$. What is the value of $a$?

1

-8.25

2

-33/4