Answer:
Number of hamburgers sold = Â 225
Number of cheese burgers sold  = 300
Step-by-step explanation:
Let the number of hamburgers sold be x.
Number of cheese burgers sold =x + 75
x + x+75 = 525
     2x  = 525 - 75
     2x = 450
      x = 450/2
      x = 225
 Number of hamburgers sold =  x = 225
Number of cheese burgers sold = 225+ 75 = 300