DRDO Multi tasking staff Model paper 9

Tips & Tricks
Given equations,
4x – 9y + 13 = 0 ----(1)
2x + 3y – 13 = 0 ----(2)
Multiplying eq. (2) by 2 and subtracting from (1), we get,
⇒ 4x – 9y + 13 – 4x – 6y + 26 = 0
⇒ 15y = 39
⇒ y = 39/15 = 2.6
Substituting in (2),
⇒ x = [13 – 3(2.6)]/2 = 2.6
∴ There is only 1 solution that the given pair of linear equations have