Answer:
x = -7 and y=8
Step-by-step explanation:
soln
using by elimination method
1|x+2y=9
1| x+y=1
|x+2y=9
-|x+y=1
x-x+2y-y=9-1
0+y=8
y=8
1|x+2y=9
2|x+y=1
|x+2y=9
-|2x+2y=2
x-2x+2y+2y=9-2
-x=7
divide -1 both side with the make value of x
x=-7
therefore x=-7 and y=8. this is my answer
