Question 544151
Form the augmented matrix:
2 -3 -9
2  2  6
Perform row operations to obtain the reduced row echelon form of the matrix 
R2 - R1
0  5  15
2  2   6

R1/5 and R2/2
0  1  3
1  1  3

R2-R1
0  1  3
1  0  0

Interchange R1 and R2
1  0  0
0  1  3

So the answer is x=0, y=3