The function \( f \) satisfies the functional equation \( 3 f(x)+ \) \( 2 f\left(\frac{x+59}{x-1...

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The function \( f \) satisfies the functional equation \( 3 f(x)+ \) \( 2 f\left(\frac{x+59}{x-1}\right)=10 x+30 \) for all real \( x \neq 1 \). The value of \( f(7) \) is
(A) 8
(B) 4
(C) \( -8 \)
(D) 11
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