Brand a has a recognition value worth 43 billion more than brand b if the total value of these two brands is 109 billion find the value of each of the brands

This can be solved by systems of linear equations. This problem asked us to find values for brand A and B. As a rule of thumb, the number of unknowns must equal to the number of independent equations. First equation is A = B +43billion  and the second is A + B = 109billion. Solve these equation simultaneously you should get: 
A=76 billion 
B = 33 billion. 

Where is the qeustion