IBPS PO Mains 2016 Paper for online practice

7x + 6y + 4z = 122 –(1)
4x + 5y + 3z = 88 –(2)
9x + 2y + z = 78 –(3)
From (1) and (2) => 5x – 2y =4 –(a)
From (2) and (3) => 23x + y = 146 –(b)
From (a) and (b) => x = 6, y = 8. Put values in eqn (3)
⇒ z = 8