Answer:
x=1 y=14
multiply x-y=-13 by 3 so the x would cancel out. solve for y
then plug in y to one of the equations to get x
I think your answer is D
The answer is (12, 10)
initial pop'n=776733
growth rate=15%
time= 15years
Then,
Pt= P(1+G/100)^t
776733(1+15/100)^15
6320324.2904 Ans