Question

solve x+y=12 and x-y=-6​

Answer 1

Answer:

x=6

Step-by-step explanation:

x+2=12

x-6=-6

________

2x=6

x=3

Answer 2

Answer:

x= 3

y= 9

Step-by-step explanation:

x+y= 12

: x= 12-y

x-y =-6 ; 12-y-y = -6

12-2y = -6

-2y = -6-12 ; -2y = -18

: y = 9

x = 12-y

= 12 - 9

= 3