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Math·Algebra·Linear equations in two variables

hard

x	y
-6	-14
-3	-16
3	-20
6	-22

The table shows four values of $x$ and their corresponding values of $y$. The linear relationship between $x$ and $y$ can be represented by the equation $2x+By=C$, where $B$ and $C$ are constants. What is the value of $C$?

1

-54