Question 921980
let x  , y be the 2 numbers
 one number is 4 less than another number
so x= y+4
  but x+y= 100
 put x=y+4 in  above equation
       (y+4) +y= 100
       y+4+y= 100
       2y+4 =100
     subtract 4 on both sides
        2y+4-4 =100-4
       2y = 96
 divide with 2 on both sides
       2y/2 = 96/2
        y= 48 
     hence x = 48+4 
              =52
 so numbers   are 52 & 48