SOLUTION: log base 4 of y + log base2 of y =12 solve for y

Your starting equation is

     +  = 12.    (1)


Use the base change formula

     =  =  = .


Therefore, equation (1) takes the form

     +  = 12

     = 12

     = 12/3 = 4

    y =  = 256.


ANSWER.  y = 256.