11x + 15y + 23 = 0 [1]
7x - 2y - 20 = 0 [2]
Multiplying the 1st equation by 2 and 2nd equation by 15, we get
22x + 30y + 46 = 0 [3]
105x - 30y - 300 = 0 [4]
Adding [3] and [4]
⇒ 22x + 30y + 46 + 105x – 30y – 300 = 0
⇒ 127x = 254
⇒ x = 2
Substituting value of x in equation 1.
⇒ 11(2) + 15y + 23 = 0
⇒ 22 + 15y + 23 = 0
⇒ 15y = -45
⇒ y = -3