Find and Simplify F(a)+f(6) for the Function $f ( x ) = 12 x - 7$

Multiple Choice

Find and simplify f(a) +f(6) for the function $f ( x ) = 12 x - 7$ .

A) $f ( a ) + f ( 6 ) = 12 a + 58$
B) $f ( a ) + f ( 6 ) = 12 a + 79$
C) $f ( a ) + f ( 6 ) = 12 a + 36$
D) $f ( a ) + f ( 6 ) = 12 a + 11$
E) $f ( a ) + f ( 6 ) = 12 a + 72$