Under the Bridge Mystery Cache

This area is full of hotels so I decided to place an easy mystery cache, one that will have enough room for all your TBs and GCs

The cache is a medium sized round metal box, in order to find it you will have to solve the following puzzle

The rules are simple you will need to replace the letters A-H with the numbers 1-9. You can use each number only once, and the equations need to be correct.
The Cahce is waiting at :

N 31 4B.AGE
E 035 1C.(G+D)AC

Two more things
a.      You can listen to this song that will get you into the right mood
b.      You can use the coordinates checker to get a photo hint of the cache location