Question 250799
Let the man invest an amount x at 2% interest.
Then, he invests an amount (x+800) at 4% interest.
Total simple interest for one year is
   x*2/100 + (x+800)*4/100 = 92
     2x+4x+3200 = 9200
             6x = 9200-3200
             6x = 6000
              x = 1000
So the man invested $ 1000 at 2% interest and $ 1800 at 4% interest.