Direction: Some equations have been solved on the basis of certain system. Find the correct answer for the unsolved equation on that basis.

Q:

If 98 – 39 – 27 = 31, 87 – 38 – 34 = 20, then 79 – 25 – 12 = ?

• 1
  51
• 2
  22
• 3
  42
• 4
  15