Question 166698
Let the money withdrawn from the bank is 'x'.

money spend for gasoline = half of the money = 1/2 x
money spend for lunch  = $ 6.55 
Balance money with him = $ 13.45 

          money withdrawn, x  =  1/2 x +6.55 + 13.45 
                              =  1/2 x  +   20.00
                 i.e.  x -1/2x  = 20  (combining like terms)
                         1/2 x  = 20 
                          1/2 * 2 x = 20 * 2 
                               x = 40 .

amount withdrawn from bank  = $40.00