Answer: the correct value of x in this will be 6.
Explanation: According to the equation given ,
f(x) = 64
so , f(x) = 11x - 2 now putting the value of f(x) in this equation
therefore , 64 = 11x - 2
now solving the equation , 11x= 64+2
11x = 66
x = 66/11
x = 6
thus, the value of x obtained from the equation is 6