Question 501620
Let X and Y be the two numbers
  X = 4Y - 3 -> equation 1
  X+Y = 27 -> equation 2

Rearranging equation 2,
  X- 4Y = -3
  X + y = 27
Subtracting the above two equations,
  -5Y = -30
   Y = 30
=> Y = 6
 X = 21

Numbers are 21,6

Check: X = 4Y - 3
  21= 4*6 - 3
  21=21