Question

x+y=-2 and 2x+4y=-14 by elimination method​

Answer 1

Answer:

2x+2y=-4

2x+4y=-14

-. -. +

-2y=10

y =-5

Answer 2

x+y=2. -________(1)

multiply equation (1) by 2

2x+2y=4. _______(2)

2x + 4y=14 ________(3)

subtract eqn (2) and (3)

2x+2y=4

-

2x+4y=14

_____________

0+ -2y=18

y= -9

put the value of y eqn( 2)

2x+2y=4

2x+2(-9)=4

2x+(-18)=4

2x - 18 = 4

2x=4+18

2x =22

x= 11

(x, y) (11,-9)