Question

11x+15y+23=0 and 7x-2y-20=0 solve by elemination method​

Answer 1

Answer:

refer to the attachment

Step-by-step explanation:

The value of X= 2 and y= -3

Answer 2

Answer:

x =2 y=-3

Step-by-step explanation:

11x +15y +23 =0

11× +15y = -23

11×= -23 -15y

x = (-23-15y)/11

7x-2y-20=0

7x-2y=20

7x= 20 +2y

× = (20 +2y)/7

By comparing

(20+2y)/7 =(-23-15y)/11

(20+2y)×11 = (-23-15y)×7

220+22y = -161-105y

105y +22y= -161-220

127y = -381

y = -381/127

y =-3

by putting this value in eq

x = (20+2(-3))/7

x= (14)/7

x= 2